diff --git a/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php b/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
index 6627630675b53..90d6ce8750887 100644
--- a/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
+++ b/src/Symfony/Bridge/Doctrine/Form/Type/EntityType.php
@@ -50,7 +50,7 @@ public function configureOptions(OptionsResolver $resolver)
      *
      * @return ORMQueryBuilderLoader
      */
-    public function getLoader(ObjectManager $manager, $queryBuilder, string $class)
+    public function getLoader(ObjectManager $manager, object $queryBuilder, string $class)
     {
         if (!$queryBuilder instanceof QueryBuilder) {
             throw new \TypeError(sprintf('Expected an instance of "%s", but got "%s".', QueryBuilder::class, get_debug_type($queryBuilder)));
@@ -76,7 +76,7 @@ public function getBlockPrefix()
      * @internal This method is public to be usable as callback. It should not
      *           be used in user code.
      */
-    public function getQueryBuilderPartsForCachingHash($queryBuilder): ?array
+    public function getQueryBuilderPartsForCachingHash(object $queryBuilder): ?array
     {
         if (!$queryBuilder instanceof QueryBuilder) {
             throw new \TypeError(sprintf('Expected an instance of "%s", but got "%s".', QueryBuilder::class, get_debug_type($queryBuilder)));
diff --git a/src/Symfony/Bridge/Twig/Node/DumpNode.php b/src/Symfony/Bridge/Twig/Node/DumpNode.php
index 16718e8a75986..68c00556f86bf 100644
--- a/src/Symfony/Bridge/Twig/Node/DumpNode.php
+++ b/src/Symfony/Bridge/Twig/Node/DumpNode.php
@@ -21,7 +21,7 @@ final class DumpNode extends Node
 {
     private $varPrefix;
 
-    public function __construct($varPrefix, ?Node $values, int $lineno, string $tag = null)
+    public function __construct(string $varPrefix, ?Node $values, int $lineno, string $tag = null)
     {
         $nodes = [];
         if (null !== $values) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/CachePoolClearerCacheWarmer.php b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/CachePoolClearerCacheWarmer.php
index fa87952621c87..0e5997996004f 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/CachePoolClearerCacheWarmer.php
+++ b/src/Symfony/Bundle/FrameworkBundle/CacheWarmer/CachePoolClearerCacheWarmer.php
@@ -39,7 +39,7 @@ public function __construct(Psr6CacheClearer $poolClearer, array $pools = [])
      *
      * @return string[]
      */
-    public function warmUp($cacheDirectory): array
+    public function warmUp(string $cacheDirectory): array
     {
         foreach ($this->pools as $pool) {
             if ($this->poolClearer->hasPool($pool)) {
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Application.php b/src/Symfony/Bundle/FrameworkBundle/Console/Application.php
index 0ce23600686dc..490d8cbb61f3e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Application.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Application.php
@@ -109,7 +109,7 @@ protected function doRunCommand(Command $command, InputInterface $input, OutputI
     /**
      * {@inheritdoc}
      */
-    public function find($name)
+    public function find(string $name)
     {
         $this->registerCommands();
 
@@ -119,7 +119,7 @@ public function find($name)
     /**
      * {@inheritdoc}
      */
-    public function get($name)
+    public function get(string $name)
     {
         $this->registerCommands();
 
@@ -135,7 +135,7 @@ public function get($name)
     /**
      * {@inheritdoc}
      */
-    public function all($namespace = null)
+    public function all(string $namespace = null)
     {
         $this->registerCommands();
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
index 72116ef4022ad..6d8f036c5572b 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/Descriptor.php
@@ -113,7 +113,7 @@ abstract protected function describeContainerTags(ContainerBuilder $builder, arr
      *
      * @param Definition|Alias|object $service
      */
-    abstract protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null);
+    abstract protected function describeContainerService(object $service, array $options = [], ContainerBuilder $builder = null);
 
     /**
      * Describes container services.
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
index ce4e66ca04541..db21717548ab5 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/JsonDescriptor.php
@@ -67,7 +67,7 @@ protected function describeContainerTags(ContainerBuilder $builder, array $optio
         $this->writeData($data, $options);
     }
 
-    protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null)
+    protected function describeContainerService(object $service, array $options = [], ContainerBuilder $builder = null)
     {
         if (!isset($options['id'])) {
             throw new \InvalidArgumentException('An "id" option must be provided.');
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
index 96170d32ad1b6..fb768e50e2448 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/MarkdownDescriptor.php
@@ -88,7 +88,7 @@ protected function describeContainerTags(ContainerBuilder $builder, array $optio
         }
     }
 
-    protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null)
+    protected function describeContainerService(object $service, array $options = [], ContainerBuilder $builder = null)
     {
         if (!isset($options['id'])) {
             throw new \InvalidArgumentException('An "id" option must be provided.');
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
index adc524ce6202b..66a4fafff2dae 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/TextDescriptor.php
@@ -141,7 +141,7 @@ protected function describeContainerTags(ContainerBuilder $builder, array $optio
         }
     }
 
-    protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null)
+    protected function describeContainerService(object $service, array $options = [], ContainerBuilder $builder = null)
     {
         if (!isset($options['id'])) {
             throw new \InvalidArgumentException('An "id" option must be provided.');
diff --git a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
index 9d52aa2e19b33..e255bae4a92d7 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Console/Descriptor/XmlDescriptor.php
@@ -53,7 +53,7 @@ protected function describeContainerTags(ContainerBuilder $builder, array $optio
         $this->writeDocument($this->getContainerTagsDocument($builder, isset($options['show_hidden']) && $options['show_hidden']));
     }
 
-    protected function describeContainerService($service, array $options = [], ContainerBuilder $builder = null)
+    protected function describeContainerService(object $service, array $options = [], ContainerBuilder $builder = null)
     {
         if (!isset($options['id'])) {
             throw new \InvalidArgumentException('An "id" option must be provided.');
@@ -255,7 +255,7 @@ private function getContainerTagsDocument(ContainerBuilder $builder, bool $showH
         return $dom;
     }
 
-    private function getContainerServiceDocument($service, string $id, ContainerBuilder $builder = null, bool $showArguments = false): \DOMDocument
+    private function getContainerServiceDocument(object $service, string $id, ContainerBuilder $builder = null, bool $showArguments = false): \DOMDocument
     {
         $dom = new \DOMDocument('1.0', 'UTF-8');
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php b/src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php
index 61049b607a288..0caa8e62df363 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Controller/AbstractController.php
@@ -396,7 +396,7 @@ protected function isCsrfTokenValid(string $id, ?string $token): bool
      *
      * @param object|Envelope $message The message or the message pre-wrapped in an envelope
      */
-    protected function dispatchMessage($message, array $stamps = []): Envelope
+    protected function dispatchMessage(object $message, array $stamps = []): Envelope
     {
         if (!$this->container->has('messenger.default_bus')) {
             $message = class_exists(Envelope::class) ? 'You need to define the "messenger.default_bus" configuration option.' : 'Try running "composer require symfony/messenger".';
diff --git a/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerResolver.php b/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerResolver.php
index b726ca48e100a..0539c1ee734ca 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerResolver.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerResolver.php
@@ -24,7 +24,7 @@ class ControllerResolver extends ContainerControllerResolver
     /**
      * {@inheritdoc}
      */
-    protected function instantiateController($class): object
+    protected function instantiateController(string $class): object
     {
         $controller = parent::instantiateController($class);
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/KernelBrowser.php b/src/Symfony/Bundle/FrameworkBundle/KernelBrowser.php
index 4a7d72213c8b9..2c2f8b5c4a358 100644
--- a/src/Symfony/Bundle/FrameworkBundle/KernelBrowser.php
+++ b/src/Symfony/Bundle/FrameworkBundle/KernelBrowser.php
@@ -112,7 +112,7 @@ public function enableReboot()
     /**
      * @param UserInterface $user
      */
-    public function loginUser($user, string $firewallContext = 'main'): self
+    public function loginUser(object $user, string $firewallContext = 'main'): self
     {
         if (!interface_exists(UserInterface::class)) {
             throw new \LogicException(sprintf('"%s" requires symfony/security-core to be installed.', __METHOD__));
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/AnnotatedRouteControllerLoader.php b/src/Symfony/Bundle/FrameworkBundle/Routing/AnnotatedRouteControllerLoader.php
index 6e5a71b8fadfd..e708b70ca712e 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/AnnotatedRouteControllerLoader.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/AnnotatedRouteControllerLoader.php
@@ -24,10 +24,8 @@ class AnnotatedRouteControllerLoader extends AnnotationClassLoader
 {
     /**
      * Configures the _controller default parameter of a given Route instance.
-     *
-     * @param object $annot The annotation class instance
      */
-    protected function configureRoute(Route $route, \ReflectionClass $class, \ReflectionMethod $method, $annot)
+    protected function configureRoute(Route $route, \ReflectionClass $class, \ReflectionMethod $method, object $annot)
     {
         if ('__invoke' === $method->getName()) {
             $route->setDefault('_controller', $class->getName());
diff --git a/src/Symfony/Bundle/FrameworkBundle/Test/BrowserKitAssertionsTrait.php b/src/Symfony/Bundle/FrameworkBundle/Test/BrowserKitAssertionsTrait.php
index 48f2b68e11e32..3874d78538f53 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Test/BrowserKitAssertionsTrait.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Test/BrowserKitAssertionsTrait.php
@@ -112,7 +112,7 @@ public static function assertRequestAttributeValueSame(string $name, string $exp
         self::assertThat(self::getRequest(), new ResponseConstraint\RequestAttributeValueSame($name, $expectedValue), $message);
     }
 
-    public static function assertRouteSame($expectedRoute, array $parameters = [], string $message = ''): void
+    public static function assertRouteSame(string $expectedRoute, array $parameters = [], string $message = ''): void
     {
         $constraint = new ResponseConstraint\RequestAttributeValueSame('_route', $expectedRoute);
         $constraints = [];
diff --git a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginFactory.php b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginFactory.php
index 393c553907364..7458a35b0e6be 100644
--- a/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginFactory.php
+++ b/src/Symfony/Bundle/SecurityBundle/DependencyInjection/Security/Factory/JsonLoginFactory.php
@@ -75,7 +75,7 @@ protected function getListenerId()
     /**
      * {@inheritdoc}
      */
-    protected function isRememberMeAware($config)
+    protected function isRememberMeAware(array $config)
     {
         return false;
     }
diff --git a/src/Symfony/Bundle/SecurityBundle/Security/FirewallConfig.php b/src/Symfony/Bundle/SecurityBundle/Security/FirewallConfig.php
index dca8ccde565c1..1a78dd2f4aa72 100644
--- a/src/Symfony/Bundle/SecurityBundle/Security/FirewallConfig.php
+++ b/src/Symfony/Bundle/SecurityBundle/Security/FirewallConfig.php
@@ -29,7 +29,7 @@ final class FirewallConfig
     private $listeners;
     private $switchUser;
 
-    public function __construct(string $name, string $userChecker, string $requestMatcher = null, bool $securityEnabled = true, bool $stateless = false, string $provider = null, string $context = null, string $entryPoint = null, string $accessDeniedHandler = null, string $accessDeniedUrl = null, array $listeners = [], $switchUser = null)
+    public function __construct(string $name, string $userChecker, string $requestMatcher = null, bool $securityEnabled = true, bool $stateless = false, string $provider = null, string $context = null, string $entryPoint = null, string $accessDeniedHandler = null, string $accessDeniedUrl = null, array $listeners = [], array $switchUser = null)
     {
         $this->name = $name;
         $this->userChecker = $userChecker;
diff --git a/src/Symfony/Bundle/WebProfilerBundle/Csp/ContentSecurityPolicyHandler.php b/src/Symfony/Bundle/WebProfilerBundle/Csp/ContentSecurityPolicyHandler.php
index a6b34e26ef547..c2af599cff3fe 100644
--- a/src/Symfony/Bundle/WebProfilerBundle/Csp/ContentSecurityPolicyHandler.php
+++ b/src/Symfony/Bundle/WebProfilerBundle/Csp/ContentSecurityPolicyHandler.php
@@ -235,7 +235,7 @@ private function hasHashOrNonce(array $directives): bool
         return false;
     }
 
-    private function getDirectiveFallback(array $directiveSet, $type)
+    private function getDirectiveFallback(array $directiveSet, string $type)
     {
         if (\in_array($type, ['script-src-elem', 'style-src-elem'], true) || !isset($directiveSet['default-src'])) {
             // Let the browser fallback on it's own
diff --git a/src/Symfony/Component/BrowserKit/Tests/TestClient.php b/src/Symfony/Component/BrowserKit/Tests/TestClient.php
index 64e4937ea58fb..bad2d47e22e32 100644
--- a/src/Symfony/Component/BrowserKit/Tests/TestClient.php
+++ b/src/Symfony/Component/BrowserKit/Tests/TestClient.php
@@ -24,12 +24,12 @@ public function setNextResponse(Response $response)
         $this->nextResponse = $response;
     }
 
-    public function setNextScript($script)
+    public function setNextScript(string $script)
     {
         $this->nextScript = $script;
     }
 
-    protected function doRequest($request): Response
+    protected function doRequest(object $request): Response
     {
         if (null === $this->nextResponse) {
             return new Response();
@@ -41,7 +41,7 @@ protected function doRequest($request): Response
         return $response;
     }
 
-    protected function getScript($request)
+    protected function getScript(object $request)
     {
         $r = new \ReflectionClass(Response::class);
         $path = $r->getFileName();
diff --git a/src/Symfony/Component/BrowserKit/Tests/TestHttpClient.php b/src/Symfony/Component/BrowserKit/Tests/TestHttpClient.php
index 377f5dc1896db..184418b7b4477 100644
--- a/src/Symfony/Component/BrowserKit/Tests/TestHttpClient.php
+++ b/src/Symfony/Component/BrowserKit/Tests/TestHttpClient.php
@@ -47,12 +47,12 @@ public function setNextResponse(Response $response)
         $this->nextResponse = $response;
     }
 
-    public function setNextScript($script)
+    public function setNextScript(string $script)
     {
         $this->nextScript = $script;
     }
 
-    protected function doRequest($request): Response
+    protected function doRequest(object $request): Response
     {
         if (null === $this->nextResponse) {
             return parent::doRequest($request);
@@ -64,7 +64,7 @@ protected function doRequest($request): Response
         return $response;
     }
 
-    protected function getScript($request)
+    protected function getScript(object $request)
     {
         $r = new \ReflectionClass(Response::class);
         $path = $r->getFileName();
diff --git a/src/Symfony/Component/Config/Definition/ArrayNode.php b/src/Symfony/Component/Config/Definition/ArrayNode.php
index d7930b2325828..4571749fe5f9b 100644
--- a/src/Symfony/Component/Config/Definition/ArrayNode.php
+++ b/src/Symfony/Component/Config/Definition/ArrayNode.php
@@ -32,9 +32,9 @@ class ArrayNode extends BaseNode implements PrototypeNodeInterface
     protected $removeExtraKeys = true;
     protected $normalizeKeys = true;
 
-    public function setNormalizeKeys($normalizeKeys)
+    public function setNormalizeKeys(bool $normalizeKeys)
     {
-        $this->normalizeKeys = (bool) $normalizeKeys;
+        $this->normalizeKeys = $normalizeKeys;
     }
 
     /**
diff --git a/src/Symfony/Component/Config/Definition/BaseNode.php b/src/Symfony/Component/Config/Definition/BaseNode.php
index db1955e96a5e4..5526697b0a151 100644
--- a/src/Symfony/Component/Config/Definition/BaseNode.php
+++ b/src/Symfony/Component/Config/Definition/BaseNode.php
@@ -187,8 +187,6 @@ public function addEquivalentValue($originalValue, $equivalentValue)
 
     /**
      * Set this node as required.
-     *
-     * @param bool $boolean Required node
      */
     public function setRequired(bool $boolean)
     {
diff --git a/src/Symfony/Component/Config/Definition/Builder/NodeDefinition.php b/src/Symfony/Component/Config/Definition/Builder/NodeDefinition.php
index 0d9c91fea4667..cee551b422ed3 100644
--- a/src/Symfony/Component/Config/Definition/Builder/NodeDefinition.php
+++ b/src/Symfony/Component/Config/Definition/Builder/NodeDefinition.php
@@ -105,8 +105,6 @@ public function end()
     /**
      * Creates the node.
      *
-     * @param bool $forceRootNode Whether to force this node as the root node
-     *
      * @return NodeInterface
      */
     public function getNode(bool $forceRootNode = false)
diff --git a/src/Symfony/Component/Config/Definition/Exception/InvalidConfigurationException.php b/src/Symfony/Component/Config/Definition/Exception/InvalidConfigurationException.php
index fcaaf49435f9d..ceb5e239bf017 100644
--- a/src/Symfony/Component/Config/Definition/Exception/InvalidConfigurationException.php
+++ b/src/Symfony/Component/Config/Definition/Exception/InvalidConfigurationException.php
@@ -22,7 +22,7 @@ class InvalidConfigurationException extends Exception
     private $path;
     private $containsHints = false;
 
-    public function setPath($path)
+    public function setPath(string $path)
     {
         $this->path = $path;
     }
diff --git a/src/Symfony/Component/Config/ResourceCheckerConfigCache.php b/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
index 190ab991acd3d..d47370132e63d 100644
--- a/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
+++ b/src/Symfony/Component/Config/ResourceCheckerConfigCache.php
@@ -181,7 +181,7 @@ private function safelyUnserialize(string $file)
     /**
      * @internal
      */
-    public static function handleUnserializeCallback($class)
+    public static function handleUnserializeCallback(string $class)
     {
         trigger_error('Class not found: '.$class);
     }
diff --git a/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php b/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
index b02d6ce6df2d4..e68d9a68a8703 100644
--- a/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
+++ b/src/Symfony/Component/Config/Tests/Definition/PrototypedArrayNodeTest.php
@@ -264,7 +264,7 @@ protected function getPrototypeNodeWithDefaultChildren()
      *
      * @dataProvider getDataForKeyRemovedLeftValueOnly
      */
-    public function testMappedAttributeKeyIsRemovedLeftValueOnly($value, $children, array $expected)
+    public function testMappedAttributeKeyIsRemovedLeftValueOnly($value, array $children, array $expected)
     {
         $node = new PrototypedArrayNode('root');
         $node->setKeyAttribute('id', true);
diff --git a/src/Symfony/Component/Config/Tests/Fixtures/Builder/NodeBuilder.php b/src/Symfony/Component/Config/Tests/Fixtures/Builder/NodeBuilder.php
index cb5106844324c..df1bcd45374d4 100644
--- a/src/Symfony/Component/Config/Tests/Fixtures/Builder/NodeBuilder.php
+++ b/src/Symfony/Component/Config/Tests/Fixtures/Builder/NodeBuilder.php
@@ -16,7 +16,7 @@
 
 class NodeBuilder extends BaseNodeBuilder
 {
-    public function barNode($name): NodeDefinition
+    public function barNode(?string $name): NodeDefinition
     {
         return $this->node($name, 'bar');
     }
diff --git a/src/Symfony/Component/Config/Tests/Resource/ResourceStub.php b/src/Symfony/Component/Config/Tests/Resource/ResourceStub.php
index 4073566d19f2a..3cf8cfdbfa3dc 100644
--- a/src/Symfony/Component/Config/Tests/Resource/ResourceStub.php
+++ b/src/Symfony/Component/Config/Tests/Resource/ResourceStub.php
@@ -27,7 +27,7 @@ public function __toString(): string
         return 'stub';
     }
 
-    public function isFresh($timestamp): bool
+    public function isFresh(int $timestamp): bool
     {
         return $this->fresh;
     }
diff --git a/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php b/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
index a7a8ae980d597..c845c76ed3ced 100644
--- a/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
+++ b/src/Symfony/Component/Config/Tests/Util/XmlUtilsTest.php
@@ -150,7 +150,7 @@ public function getDataForConvertDomToArray(): array
     /**
      * @dataProvider getDataForPhpize
      */
-    public function testPhpize($expected, $value)
+    public function testPhpize($expected, string $value)
     {
         $this->assertSame($expected, XmlUtils::phpize($value));
     }
diff --git a/src/Symfony/Component/Console/Command/Command.php b/src/Symfony/Component/Console/Command/Command.php
index 5eb8bf10fd158..eeeea038a4d51 100644
--- a/src/Symfony/Component/Console/Command/Command.php
+++ b/src/Symfony/Component/Console/Command/Command.php
@@ -376,7 +376,7 @@ public function getNativeDefinition()
      * Adds an argument.
      *
      * @param int|null $mode    The argument mode: InputArgument::REQUIRED or InputArgument::OPTIONAL
-     * @param mixed    $default     The default value (for InputArgument::OPTIONAL mode only)
+     * @param mixed    $default The default value (for InputArgument::OPTIONAL mode only)
      *
      * @throws InvalidArgumentException When argument mode is not valid
      *
diff --git a/src/Symfony/Component/Console/Descriptor/Descriptor.php b/src/Symfony/Component/Console/Descriptor/Descriptor.php
index 2ecc59e4e27e4..a3648301fec88 100644
--- a/src/Symfony/Component/Console/Descriptor/Descriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/Descriptor.php
@@ -34,7 +34,7 @@ abstract class Descriptor implements DescriptorInterface
     /**
      * {@inheritdoc}
      */
-    public function describe(OutputInterface $output, $object, array $options = [])
+    public function describe(OutputInterface $output, object $object, array $options = [])
     {
         $this->output = $output;
 
diff --git a/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php b/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
index 3748335ea388e..4f0df65197f0a 100644
--- a/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
+++ b/src/Symfony/Component/Console/Descriptor/MarkdownDescriptor.php
@@ -31,7 +31,7 @@ class MarkdownDescriptor extends Descriptor
     /**
      * {@inheritdoc}
      */
-    public function describe(OutputInterface $output, $object, array $options = [])
+    public function describe(OutputInterface $output, object $object, array $options = [])
     {
         $decorated = $output->isDecorated();
         $output->setDecorated(false);
diff --git a/src/Symfony/Component/Console/Input/InputOption.php b/src/Symfony/Component/Console/Input/InputOption.php
index 2bb86cd2b0701..1bba552e32bf0 100644
--- a/src/Symfony/Component/Console/Input/InputOption.php
+++ b/src/Symfony/Component/Console/Input/InputOption.php
@@ -48,11 +48,9 @@ class InputOption
     private $description;
 
     /**
-     * @param string            $name        The option name
-     * @param string|array|null $shortcut    The shortcuts, can be null, a string of shortcuts delimited by | or an array of shortcuts
-     * @param int|null          $mode        The option mode: One of the VALUE_* constants
-     * @param string            $description A description text
-     * @param mixed             $default     The default value (must be null for self::VALUE_NONE)
+     * @param string|array|null $shortcut The shortcuts, can be null, a string of shortcuts delimited by | or an array of shortcuts
+     * @param int|null          $mode     The option mode: One of the VALUE_* constants
+     * @param mixed             $default  The default value (must be null for self::VALUE_NONE)
      *
      * @throws InvalidArgumentException If option mode is invalid or incompatible
      */
diff --git a/src/Symfony/Component/Console/Output/ConsoleSectionOutput.php b/src/Symfony/Component/Console/Output/ConsoleSectionOutput.php
index c19edbf95e9d7..ec9fece860813 100644
--- a/src/Symfony/Component/Console/Output/ConsoleSectionOutput.php
+++ b/src/Symfony/Component/Console/Output/ConsoleSectionOutput.php
@@ -92,7 +92,7 @@ public function addContent(string $input)
     /**
      * {@inheritdoc}
      */
-    protected function doWrite($message, $newline)
+    protected function doWrite(string $message, bool $newline)
     {
         if (!$this->isDecorated()) {
             parent::doWrite($message, $newline);
diff --git a/src/Symfony/Component/Console/Output/TrimmedBufferOutput.php b/src/Symfony/Component/Console/Output/TrimmedBufferOutput.php
index a03aa835f0086..370f9888d7dd8 100644
--- a/src/Symfony/Component/Console/Output/TrimmedBufferOutput.php
+++ b/src/Symfony/Component/Console/Output/TrimmedBufferOutput.php
@@ -54,7 +54,7 @@ public function fetch()
     /**
      * {@inheritdoc}
      */
-    protected function doWrite($message, $newline)
+    protected function doWrite(string $message, bool $newline)
     {
         $this->buffer .= $message;
 
diff --git a/src/Symfony/Component/Console/Question/Question.php b/src/Symfony/Component/Console/Question/Question.php
index 0b5eefd546e54..85613fc6eea63 100644
--- a/src/Symfony/Component/Console/Question/Question.php
+++ b/src/Symfony/Component/Console/Question/Question.php
@@ -95,13 +95,11 @@ public function isHidden()
     /**
      * Sets whether the user response must be hidden or not.
      *
-     * @param bool $hidden
-     *
      * @return $this
      *
      * @throws LogicException In case the autocompleter is also used
      */
-    public function setHidden($hidden)
+    public function setHidden(bool $hidden)
     {
         if ($this->autocompleterCallback) {
             throw new LogicException('A hidden question cannot use the autocompleter.');
@@ -125,11 +123,9 @@ public function isHiddenFallback()
     /**
      * Sets whether to fallback on non-hidden question if the response can not be hidden.
      *
-     * @param bool $fallback
-     *
      * @return $this
      */
-    public function setHiddenFallback($fallback)
+    public function setHiddenFallback(bool $fallback)
     {
         $this->hiddenFallback = (bool) $fallback;
 
diff --git a/src/Symfony/Component/Console/Style/SymfonyStyle.php b/src/Symfony/Component/Console/Style/SymfonyStyle.php
index 4fa6650756df6..668288f5cec3b 100644
--- a/src/Symfony/Component/Console/Style/SymfonyStyle.php
+++ b/src/Symfony/Component/Console/Style/SymfonyStyle.php
@@ -264,7 +264,7 @@ public function definitionList(...$list)
     /**
      * {@inheritdoc}
      */
-    public function ask(string $question, string $default = null, $validator = null)
+    public function ask(string $question, string $default = null, callable $validator = null)
     {
         $question = new Question($question, $default);
         $question->setValidator($validator);
@@ -275,7 +275,7 @@ public function ask(string $question, string $default = null, $validator = null)
     /**
      * {@inheritdoc}
      */
-    public function askHidden(string $question, $validator = null)
+    public function askHidden(string $question, callable $validator = null)
     {
         $question = new Question($question);
 
diff --git a/src/Symfony/Component/CssSelector/XPath/Translator.php b/src/Symfony/Component/CssSelector/XPath/Translator.php
index 13e1adacd583e..3fab76ad699a7 100644
--- a/src/Symfony/Component/CssSelector/XPath/Translator.php
+++ b/src/Symfony/Component/CssSelector/XPath/Translator.php
@@ -203,7 +203,7 @@ public function addPseudoClass(XPathExpr $xpath, string $pseudoClass): XPathExpr
     /**
      * @throws ExpressionErrorException
      */
-    public function addAttributeMatching(XPathExpr $xpath, string $operator, string $attribute, $value): XPathExpr
+    public function addAttributeMatching(XPathExpr $xpath, string $operator, string $attribute, ?string $value): XPathExpr
     {
         if (!isset($this->attributeMatchingTranslators[$operator])) {
             throw new ExpressionErrorException(sprintf('Attribute matcher operator "%s" not supported.', $operator));
diff --git a/src/Symfony/Component/DependencyInjection/ChildDefinition.php b/src/Symfony/Component/DependencyInjection/ChildDefinition.php
index c8f88be3e64c9..d51fdd2ef69e8 100644
--- a/src/Symfony/Component/DependencyInjection/ChildDefinition.php
+++ b/src/Symfony/Component/DependencyInjection/ChildDefinition.php
@@ -44,11 +44,9 @@ public function getParent()
     /**
      * Sets the Definition to inherit from.
      *
-     * @param string $parent
-     *
      * @return $this
      */
-    public function setParent($parent)
+    public function setParent(string $parent)
     {
         $this->parent = $parent;
 
diff --git a/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraph.php b/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraph.php
index 308abc656611d..1225514c24f21 100644
--- a/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraph.php
+++ b/src/Symfony/Component/DependencyInjection/Compiler/ServiceReferenceGraph.php
@@ -12,6 +12,7 @@
 namespace Symfony\Component\DependencyInjection\Compiler;
 
 use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Reference;
 
 /**
  * This is a directed graph of your services.
@@ -73,7 +74,7 @@ public function clear()
     /**
      * Connects 2 nodes together in the Graph.
      */
-    public function connect(?string $sourceId, $sourceValue, ?string $destId, $destValue = null, $reference = null, bool $lazy = false, bool $weak = false, bool $byConstructor = false)
+    public function connect(?string $sourceId, $sourceValue, ?string $destId, $destValue = null, Reference $reference = null, bool $lazy = false, bool $weak = false, bool $byConstructor = false)
     {
         if (null === $sourceId || null === $destId) {
             return;
diff --git a/src/Symfony/Component/DependencyInjection/Container.php b/src/Symfony/Component/DependencyInjection/Container.php
index 4c6482063c206..4554e3bce8855 100644
--- a/src/Symfony/Component/DependencyInjection/Container.php
+++ b/src/Symfony/Component/DependencyInjection/Container.php
@@ -107,8 +107,6 @@ public function getParameterBag()
     /**
      * Gets a parameter.
      *
-     * @param string $name The parameter name
-     *
      * @return mixed
      *
      * @throws InvalidArgumentException if the parameter is not defined
@@ -119,10 +117,6 @@ public function getParameter(string $name)
     }
 
     /**
-     * Checks if a parameter exists.
-     *
-     * @param string $name The parameter name
-     *
      * @return bool The presence of parameter in container
      */
     public function hasParameter(string $name)
@@ -210,9 +204,6 @@ public function has($id)
     /**
      * Gets a service.
      *
-     * @param string $id              The service identifier
-     * @param int    $invalidBehavior The behavior when the service does not exist
-     *
      * @return object|null The associated service
      *
      * @throws ServiceCircularReferenceException When a circular reference is detected
@@ -286,8 +277,6 @@ private function make(string $id, int $invalidBehavior)
     /**
      * Returns true if the given service has actually been initialized.
      *
-     * @param string $id The service identifier
-     *
      * @return bool true if service has already been initialized, false otherwise
      */
     public function initialized(string $id)
@@ -345,11 +334,9 @@ public function getRemovedIds()
     /**
      * Camelizes a string.
      *
-     * @param string $id A string to camelize
-     *
      * @return string The camelized string
      */
-    public static function camelize($id)
+    public static function camelize(string $id)
     {
         return strtr(ucwords(strtr($id, ['_' => ' ', '.' => '_ ', '\\' => '_ '])), [' ' => '']);
     }
@@ -357,11 +344,9 @@ public static function camelize($id)
     /**
      * A string to underscore.
      *
-     * @param string $id The string to underscore
-     *
      * @return string The underscored string
      */
-    public static function underscore($id)
+    public static function underscore(string $id)
     {
         return strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], ['\\1_\\2', '\\1_\\2'], str_replace('_', '.', $id)));
     }
@@ -369,7 +354,7 @@ public static function underscore($id)
     /**
      * Creates a service by requiring its factory file.
      */
-    protected function load($file)
+    protected function load(string $file)
     {
         return require $file;
     }
@@ -377,13 +362,11 @@ protected function load($file)
     /**
      * Fetches a variable from the environment.
      *
-     * @param string $name The name of the environment variable
-     *
      * @return mixed The value to use for the provided environment variable name
      *
      * @throws EnvNotFoundException When the environment variable is not found and has no default value
      */
-    protected function getEnv($name)
+    protected function getEnv(string $name)
     {
         if (isset($this->resolving[$envName = "env($name)"])) {
             throw new ParameterCircularReferenceException(array_keys($this->resolving));
diff --git a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
index bf79613b731a8..98c4b52d6f43c 100644
--- a/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
+++ b/src/Symfony/Component/DependencyInjection/ContainerBuilder.php
@@ -519,11 +519,6 @@ public function has($id)
     }
 
     /**
-     * Gets a service.
-     *
-     * @param string $id              The service identifier
-     * @param int    $invalidBehavior The behavior when the service does not exist
-     *
      * @return object|null The associated service
      *
      * @throws InvalidArgumentException          when no definitions are available
@@ -829,11 +824,6 @@ public function setAlias(string $alias, $id)
         return $this->aliasDefinitions[$alias] = $id;
     }
 
-    /**
-     * Removes an alias.
-     *
-     * @param string $alias The alias to remove
-     */
     public function removeAlias(string $alias)
     {
         if (isset($this->aliasDefinitions[$alias])) {
@@ -843,8 +833,6 @@ public function removeAlias(string $alias)
     }
 
     /**
-     * Returns true if an alias exists under the given identifier.
-     *
      * @return bool true if the alias exists, false otherwise
      */
     public function hasAlias(string $id)
@@ -861,8 +849,6 @@ public function getAliases()
     }
 
     /**
-     * Gets an alias.
-     *
      * @return Alias An Alias instance
      *
      * @throws InvalidArgumentException if the alias does not exist
@@ -1520,7 +1506,7 @@ public static function hash($value)
     /**
      * {@inheritdoc}
      */
-    protected function getEnv($name)
+    protected function getEnv(string $name)
     {
         $value = parent::getEnv($name);
         $bag = $this->getParameterBag();
@@ -1549,7 +1535,7 @@ protected function getEnv($name)
         }
     }
 
-    private function callMethod($service, array $call, array &$inlineServices)
+    private function callMethod(object $service, array $call, array &$inlineServices)
     {
         foreach (self::getServiceConditionals($call[1]) as $s) {
             if (!$this->has($s)) {
diff --git a/src/Symfony/Component/DependencyInjection/ContainerInterface.php b/src/Symfony/Component/DependencyInjection/ContainerInterface.php
index 657c9c1ae11ea..2135dcdd3671c 100644
--- a/src/Symfony/Component/DependencyInjection/ContainerInterface.php
+++ b/src/Symfony/Component/DependencyInjection/ContainerInterface.php
@@ -65,22 +65,14 @@ public function has($id);
     public function initialized(string $id);
 
     /**
-     * Gets a parameter.
-     *
-     * @param string $name The parameter name
-     *
-     * @return mixed The parameter value
+     * @return mixed
      *
      * @throws InvalidArgumentException if the parameter is not defined
      */
     public function getParameter(string $name);
 
     /**
-     * Checks if a parameter exists.
-     *
-     * @param string $name The parameter name
-     *
-     * @return bool The presence of parameter in container
+     * @return bool
      */
     public function hasParameter(string $name);
 
diff --git a/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php b/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
index 8af993b8a4898..5d38310141d1b 100644
--- a/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
+++ b/src/Symfony/Component/DependencyInjection/Exception/ParameterNotFoundException.php
@@ -84,14 +84,14 @@ public function getSourceKey()
         return $this->sourceKey;
     }
 
-    public function setSourceId($sourceId)
+    public function setSourceId(?string $sourceId)
     {
         $this->sourceId = $sourceId;
 
         $this->updateRepr();
     }
 
-    public function setSourceKey($sourceKey)
+    public function setSourceKey(?string $sourceKey)
     {
         $this->sourceKey = $sourceKey;
 
diff --git a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
index ef13cd989dd38..a874715f9da31 100644
--- a/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/DependencyInjection/Loader/YamlFileLoader.php
@@ -716,13 +716,11 @@ private function parseCallable($callable, string $parameter, string $id, string
     /**
      * Loads a YAML file.
      *
-     * @param string $file
-     *
      * @return array The file content
      *
      * @throws InvalidArgumentException when the given file is not a local file or when it does not exist
      */
-    protected function loadFile($file)
+    protected function loadFile(string $file)
     {
         if (!class_exists(\Symfony\Component\Yaml\Parser::class)) {
             throw new RuntimeException('Unable to load YAML config files as the Symfony Yaml Component is not installed.');
diff --git a/src/Symfony/Component/DomCrawler/Crawler.php b/src/Symfony/Component/DomCrawler/Crawler.php
index 79fae3eac8e63..ce409e7c54ef8 100644
--- a/src/Symfony/Component/DomCrawler/Crawler.php
+++ b/src/Symfony/Component/DomCrawler/Crawler.php
@@ -1094,11 +1094,9 @@ public function getIterator()
     }
 
     /**
-     * @param \DOMElement $node
-     *
      * @return array
      */
-    protected function sibling($node, string $siblingDir = 'nextSibling')
+    protected function sibling(\DOMNode $node, string $siblingDir = 'nextSibling')
     {
         $nodes = [];
 
diff --git a/src/Symfony/Component/Dotenv/Dotenv.php b/src/Symfony/Component/Dotenv/Dotenv.php
index ba560032a6eb1..ade7fa5978a0b 100644
--- a/src/Symfony/Component/Dotenv/Dotenv.php
+++ b/src/Symfony/Component/Dotenv/Dotenv.php
@@ -71,7 +71,7 @@ public function setProdEnvs(array $prodEnvs): self
      *
      * @return $this
      */
-    public function usePutenv($usePutenv = true): self
+    public function usePutenv(bool $usePutenv = true): self
     {
         $this->usePutenv = $usePutenv;
 
diff --git a/src/Symfony/Component/ErrorHandler/Exception/FlattenException.php b/src/Symfony/Component/ErrorHandler/Exception/FlattenException.php
index 4ba3d9440328d..bcb31b0f6af65 100644
--- a/src/Symfony/Component/ErrorHandler/Exception/FlattenException.php
+++ b/src/Symfony/Component/ErrorHandler/Exception/FlattenException.php
@@ -63,7 +63,7 @@ class FlattenException
     /**
      * @return static
      */
-    public static function create(\Exception $exception, $statusCode = null, array $headers = []): self
+    public static function create(\Exception $exception, int $statusCode = null, array $headers = []): self
     {
         return static::createFromThrowable($exception, $statusCode, $headers);
     }
@@ -131,11 +131,9 @@ public function getStatusCode(): int
     }
 
     /**
-     * @param int $code
-     *
      * @return $this
      */
-    public function setStatusCode($code): self
+    public function setStatusCode(int $code): self
     {
         $this->statusCode = $code;
 
@@ -163,11 +161,9 @@ public function getClass(): string
     }
 
     /**
-     * @param string $class
-     *
      * @return $this
      */
-    public function setClass($class): self
+    public function setClass(string $class): self
     {
         $this->class = false !== strpos($class, "@anonymous\0") ? (get_parent_class($class) ?: key(class_implements($class)) ?: 'class').'@anonymous' : $class;
 
@@ -180,11 +176,9 @@ public function getFile(): string
     }
 
     /**
-     * @param string $file
-     *
      * @return $this
      */
-    public function setFile($file): self
+    public function setFile(string $file): self
     {
         $this->file = $file;
 
@@ -197,11 +191,9 @@ public function getLine(): int
     }
 
     /**
-     * @param int $line
-     *
      * @return $this
      */
-    public function setLine($line): self
+    public function setLine(int $line): self
     {
         $this->line = $line;
 
@@ -226,11 +218,9 @@ public function getMessage(): string
     }
 
     /**
-     * @param string $message
-     *
      * @return $this
      */
-    public function setMessage($message): self
+    public function setMessage(string $message): self
     {
         if (false !== strpos($message, "@anonymous\0")) {
             $message = preg_replace_callback('/[a-zA-Z_\x7f-\xff][\\\\a-zA-Z0-9_\x7f-\xff]*+@anonymous\x00.*?\.php(?:0x?|:[0-9]++\$)[0-9a-fA-F]++/', function ($m) {
@@ -308,13 +298,10 @@ public function setTraceFromThrowable(\Throwable $throwable): self
     }
 
     /**
-     * @param array       $trace
-     * @param string|null $file
-     * @param int|null    $line
      *
      * @return $this
      */
-    public function setTrace($trace, $file, $line): self
+    public function setTrace(array $trace, ?string $file, ?int $line): self
     {
         $this->trace = [];
         $this->trace[] = [
diff --git a/src/Symfony/Component/EventDispatcher/EventDispatcherInterface.php b/src/Symfony/Component/EventDispatcher/EventDispatcherInterface.php
index 88c707c9a360b..9251e02e67ea8 100644
--- a/src/Symfony/Component/EventDispatcher/EventDispatcherInterface.php
+++ b/src/Symfony/Component/EventDispatcher/EventDispatcherInterface.php
@@ -25,11 +25,10 @@ interface EventDispatcherInterface extends ContractsEventDispatcherInterface
     /**
      * Adds an event listener that listens on the specified events.
      *
-     * @param callable $listener The listener
-     * @param int      $priority The higher this value, the earlier an event
-     *                           listener will be triggered in the chain (defaults to 0)
+     * @param int $priority The higher this value, the earlier an event
+     *                      listener will be triggered in the chain (defaults to 0)
      */
-    public function addListener(string $eventName, $listener, int $priority = 0);
+    public function addListener(string $eventName, callable $listener, int $priority = 0);
 
     /**
      * Adds an event subscriber.
@@ -41,10 +40,8 @@ public function addSubscriber(EventSubscriberInterface $subscriber);
 
     /**
      * Removes an event listener from the specified events.
-     *
-     * @param callable $listener The listener to remove
      */
-    public function removeListener(string $eventName, $listener);
+    public function removeListener(string $eventName, callable $listener);
 
     public function removeSubscriber(EventSubscriberInterface $subscriber);
 
@@ -60,11 +57,9 @@ public function getListeners(string $eventName = null);
      *
      * Returns null if the event or the listener does not exist.
      *
-     * @param callable $listener The listener
-     *
      * @return int|null The event listener priority
      */
-    public function getListenerPriority(string $eventName, $listener);
+    public function getListenerPriority(string $eventName, callable $listener);
 
     /**
      * Checks whether an event has any registered listeners.
diff --git a/src/Symfony/Component/ExpressionLanguage/Node/ArrayNode.php b/src/Symfony/Component/ExpressionLanguage/Node/ArrayNode.php
index 1644b2e2a8339..a8d68f924241a 100644
--- a/src/Symfony/Component/ExpressionLanguage/Node/ArrayNode.php
+++ b/src/Symfony/Component/ExpressionLanguage/Node/ArrayNode.php
@@ -96,7 +96,7 @@ protected function getKeyValuePairs()
         return $pairs;
     }
 
-    protected function compileArguments(Compiler $compiler, $withKeys = true)
+    protected function compileArguments(Compiler $compiler, bool $withKeys = true)
     {
         $first = true;
         foreach ($this->getKeyValuePairs() as $pair) {
diff --git a/src/Symfony/Component/ExpressionLanguage/Token.php b/src/Symfony/Component/ExpressionLanguage/Token.php
index d1cb270d75c83..2474218da27c0 100644
--- a/src/Symfony/Component/ExpressionLanguage/Token.php
+++ b/src/Symfony/Component/ExpressionLanguage/Token.php
@@ -54,11 +54,9 @@ public function __toString()
     /**
      * Tests the current token for a type and/or a value.
      *
-     * @param string $type The type to test
-     *
      * @return bool
      */
-    public function test($type, string $value = null)
+    public function test(string $type, string $value = null)
     {
         return $this->type === $type && (null === $value || $this->value == $value);
     }
diff --git a/src/Symfony/Component/ExpressionLanguage/TokenStream.php b/src/Symfony/Component/ExpressionLanguage/TokenStream.php
index 8d5a1cbd51515..130513bbf8d21 100644
--- a/src/Symfony/Component/ExpressionLanguage/TokenStream.php
+++ b/src/Symfony/Component/ExpressionLanguage/TokenStream.php
@@ -56,12 +56,9 @@ public function next()
     }
 
     /**
-     * Tests a token.
-     *
-     * @param array|int   $type    The type to test
      * @param string|null $message The syntax error message
      */
-    public function expect($type, string $value = null, string $message = null)
+    public function expect(string $type, string $value = null, string $message = null)
     {
         $token = $this->current;
         if (!$token->test($type, $value)) {
diff --git a/src/Symfony/Component/Filesystem/Tests/Fixtures/MockStream/MockStream.php b/src/Symfony/Component/Filesystem/Tests/Fixtures/MockStream/MockStream.php
index 3c66d8b9ac452..d9298bd924338 100644
--- a/src/Symfony/Component/Filesystem/Tests/Fixtures/MockStream/MockStream.php
+++ b/src/Symfony/Component/Filesystem/Tests/Fixtures/MockStream/MockStream.php
@@ -26,7 +26,7 @@ class MockStream
      * @param string $opened_path If the path is opened successfully, and STREAM_USE_PATH is set in options,
      *                            opened_path should be set to the full path of the file/resource that was actually opened
      */
-    public function stream_open($path, $mode, $options, &$opened_path): bool
+    public function stream_open(string $path, string $mode, int $options, string &$opened_path = null): bool
     {
         return true;
     }
@@ -37,7 +37,7 @@ public function stream_open($path, $mode, $options, &$opened_path): bool
      *
      * @return array File stats
      */
-    public function url_stat($path, $flags): array
+    public function url_stat(string $path, int $flags): array
     {
         return [];
     }
diff --git a/src/Symfony/Component/HttpClient/CurlHttpClient.php b/src/Symfony/Component/HttpClient/CurlHttpClient.php
index 9025c27fb5fda..2e9bb23429fed 100644
--- a/src/Symfony/Component/HttpClient/CurlHttpClient.php
+++ b/src/Symfony/Component/HttpClient/CurlHttpClient.php
@@ -512,7 +512,7 @@ private static function createRedirectResolver(array $options, string $host): \C
         };
     }
 
-    private function findConstantName($opt): ?string
+    private function findConstantName(int $opt): ?string
     {
         $constants = array_filter(get_defined_constants(), static function ($v, $k) use ($opt) {
             return $v === $opt && 'C' === $k[0] && (0 === strpos($k, 'CURLOPT_') || 0 === strpos($k, 'CURLINFO_'));
diff --git a/src/Symfony/Component/HttpClient/Response/TraceableResponse.php b/src/Symfony/Component/HttpClient/Response/TraceableResponse.php
index d98b5c905a0f9..34edee254b89a 100644
--- a/src/Symfony/Component/HttpClient/Response/TraceableResponse.php
+++ b/src/Symfony/Component/HttpClient/Response/TraceableResponse.php
@@ -202,7 +202,7 @@ public static function stream(HttpClientInterface $client, iterable $responses,
         }
     }
 
-    private function checkStatusCode($code)
+    private function checkStatusCode(int $code)
     {
         if (500 <= $code) {
             throw new ServerException($this);
diff --git a/src/Symfony/Component/HttpClient/ScopingHttpClient.php b/src/Symfony/Component/HttpClient/ScopingHttpClient.php
index 691cbc3b087ea..fd720b3c2b4b9 100644
--- a/src/Symfony/Component/HttpClient/ScopingHttpClient.php
+++ b/src/Symfony/Component/HttpClient/ScopingHttpClient.php
@@ -43,7 +43,7 @@ public function __construct(HttpClientInterface $client, array $defaultOptionsBy
         }
     }
 
-    public static function forBaseUri(HttpClientInterface $client, string $baseUri, array $defaultOptions = [], $regexp = null): self
+    public static function forBaseUri(HttpClientInterface $client, string $baseUri, array $defaultOptions = [], string $regexp = null): self
     {
         if (null === $regexp) {
             $regexp = preg_quote(implode('', self::resolveUrl(self::parseUrl('.'), self::parseUrl($baseUri))));
diff --git a/src/Symfony/Component/HttpFoundation/FileBag.php b/src/Symfony/Component/HttpFoundation/FileBag.php
index 346c21e983d01..68ce892731679 100644
--- a/src/Symfony/Component/HttpFoundation/FileBag.php
+++ b/src/Symfony/Component/HttpFoundation/FileBag.php
@@ -107,11 +107,9 @@ protected function convertFileInformation($file)
      * It's safe to pass an already converted array, in which case this method
      * just returns the original array unmodified.
      *
-     * @param array $data
-     *
      * @return array
      */
-    protected function fixPhpFilesArray($data)
+    protected function fixPhpFilesArray(array $data)
     {
         $keys = array_keys($data);
         sort($keys);
diff --git a/src/Symfony/Component/HttpFoundation/InputBag.php b/src/Symfony/Component/HttpFoundation/InputBag.php
index 2c21748e08c7d..5421df572ee63 100644
--- a/src/Symfony/Component/HttpFoundation/InputBag.php
+++ b/src/Symfony/Component/HttpFoundation/InputBag.php
@@ -16,7 +16,7 @@
 /**
  * InputBag is a container for user input values such as $_GET, $_POST, $_REQUEST, and $_COOKIE.
  *
- * @author Saif Eddin Gmati <saif.gmati@symfony.com>
+ * @author Saif Eddin Gmati <azjezz@protonmail.com>
  */
 final class InputBag extends ParameterBag
 {
diff --git a/src/Symfony/Component/HttpFoundation/Response.php b/src/Symfony/Component/HttpFoundation/Response.php
index 01f84670567a8..ae1546a115a81 100644
--- a/src/Symfony/Component/HttpFoundation/Response.php
+++ b/src/Symfony/Component/HttpFoundation/Response.php
@@ -462,7 +462,7 @@ public function getProtocolVersion(): string
      *
      * @final
      */
-    public function setStatusCode(int $code, $text = null): object
+    public function setStatusCode(int $code, string $text = null): object
     {
         $this->statusCode = $code;
         if ($this->isInvalid()) {
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
index d81919919ff46..ca81714771182 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/DumpDataCollector.php
@@ -192,7 +192,7 @@ public function getDumpsCount(): int
         return $this->dataCount;
     }
 
-    public function getDumps($format, $maxDepthLimit = -1, $maxItemsPerDepth = -1): array
+    public function getDumps(string $format, int $maxDepthLimit = -1, int $maxItemsPerDepth = -1): array
     {
         $data = fopen('php://memory', 'r+');
 
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
index 3d781fa36a5ae..17449b411d1e0 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/LoggerDataCollector.php
@@ -29,7 +29,7 @@ class LoggerDataCollector extends DataCollector implements LateDataCollectorInte
     private $currentRequest;
     private $requestStack;
 
-    public function __construct($logger = null, string $containerPathPrefix = null, RequestStack $requestStack = null)
+    public function __construct(object $logger = null, string $containerPathPrefix = null, RequestStack $requestStack = null)
     {
         if (null !== $logger && $logger instanceof DebugLoggerInterface) {
             $this->logger = $logger;
diff --git a/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php b/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
index 6f27f379af8a1..425715669ec77 100644
--- a/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
+++ b/src/Symfony/Component/HttpKernel/DataCollector/RequestDataCollector.php
@@ -214,12 +214,12 @@ public function getRequestHeaders()
         return new ParameterBag($this->data['request_headers']->getValue());
     }
 
-    public function getRequestServer($raw = false)
+    public function getRequestServer(bool $raw = false)
     {
         return new ParameterBag($this->data['request_server']->getValue($raw));
     }
 
-    public function getRequestCookies($raw = false)
+    public function getRequestCookies(bool $raw = false)
     {
         return new ParameterBag($this->data['request_cookies']->getValue($raw));
     }
diff --git a/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php b/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
index 3bbdbd3ce8574..ea45fdcb3f1fe 100644
--- a/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
+++ b/src/Symfony/Component/HttpKernel/Fragment/InlineFragmentRenderer.php
@@ -105,7 +105,7 @@ public function render($uri, Request $request, array $options = [])
         }
     }
 
-    protected function createSubRequest($uri, Request $request)
+    protected function createSubRequest(string $uri, Request $request)
     {
         $cookies = $request->cookies->all();
         $server = $request->server->all();
diff --git a/src/Symfony/Component/Intl/Countries.php b/src/Symfony/Component/Intl/Countries.php
index f3fae27c202d4..ad46c794dadd2 100644
--- a/src/Symfony/Component/Intl/Countries.php
+++ b/src/Symfony/Component/Intl/Countries.php
@@ -109,7 +109,7 @@ public static function getAlpha3Name(string $alpha3Code, string $displayLocale =
      *
      * @return string[]
      */
-    public static function getNames($displayLocale = null): array
+    public static function getNames(?string $displayLocale = null): array
     {
         return self::asort(self::readEntry(['Names'], $displayLocale), $displayLocale);
     }
@@ -121,7 +121,7 @@ public static function getNames($displayLocale = null): array
      *
      * @return string[]
      */
-    public static function getAlpha3Names($displayLocale = null): array
+    public static function getAlpha3Names(?string $displayLocale = null): array
     {
         $alpha2Names = self::getNames($displayLocale);
         $alpha3Names = [];
diff --git a/src/Symfony/Component/Intl/Languages.php b/src/Symfony/Component/Intl/Languages.php
index 847b07a67fc18..c7e0a1deee960 100644
--- a/src/Symfony/Component/Intl/Languages.php
+++ b/src/Symfony/Component/Intl/Languages.php
@@ -159,7 +159,7 @@ public static function getAlpha3Name(string $language, string $displayLocale = n
      *
      * @return string[]
      */
-    public static function getAlpha3Names($displayLocale = null): array
+    public static function getAlpha3Names(string $displayLocale = null): array
     {
         $alpha2Names = self::getNames($displayLocale);
         $alpha3Names = [];
diff --git a/src/Symfony/Component/Intl/Locales.php b/src/Symfony/Component/Intl/Locales.php
index 1b2d0d2adf258..1be7cea90922e 100644
--- a/src/Symfony/Component/Intl/Locales.php
+++ b/src/Symfony/Component/Intl/Locales.php
@@ -67,7 +67,7 @@ public static function getName(string $locale, string $displayLocale = null): st
     /**
      * @return string[]
      */
-    public static function getNames($displayLocale = null): array
+    public static function getNames(string $displayLocale = null): array
     {
         return self::asort(self::readEntry(['Names'], $displayLocale), $displayLocale);
     }
diff --git a/src/Symfony/Component/Intl/Scripts.php b/src/Symfony/Component/Intl/Scripts.php
index bb29f0095bee3..9c70b8b59bd87 100644
--- a/src/Symfony/Component/Intl/Scripts.php
+++ b/src/Symfony/Component/Intl/Scripts.php
@@ -51,7 +51,7 @@ public static function getName(string $script, string $displayLocale = null): st
     /**
      * @return string[]
      */
-    public static function getNames($displayLocale = null): array
+    public static function getNames(string $displayLocale = null): array
     {
         return self::asort(self::readEntry(['Names'], $displayLocale), $displayLocale);
     }
diff --git a/src/Symfony/Component/Intl/Util/IntlTestHelper.php b/src/Symfony/Component/Intl/Util/IntlTestHelper.php
index d77d3e4da8ed2..8404194d5ee0a 100644
--- a/src/Symfony/Component/Intl/Util/IntlTestHelper.php
+++ b/src/Symfony/Component/Intl/Util/IntlTestHelper.php
@@ -30,7 +30,7 @@ class IntlTestHelper
     /**
      * Should be called before tests that work fine with the stub implementation.
      */
-    public static function requireIntl(TestCase $testCase, $minimumIcuVersion = null)
+    public static function requireIntl(TestCase $testCase, string $minimumIcuVersion = null)
     {
         if (null === $minimumIcuVersion) {
             $minimumIcuVersion = Intl::getIcuStubVersion();
@@ -64,7 +64,7 @@ public static function requireIntl(TestCase $testCase, $minimumIcuVersion = null
      * Should be called before tests that require a feature-complete intl
      * implementation.
      */
-    public static function requireFullIntl(TestCase $testCase, $minimumIcuVersion = null)
+    public static function requireFullIntl(TestCase $testCase, string $minimumIcuVersion = null)
     {
         // We only run tests if the intl extension is loaded...
         if (!Intl::isExtensionLoaded()) {
diff --git a/src/Symfony/Component/Lock/Store/MongoDbStore.php b/src/Symfony/Component/Lock/Store/MongoDbStore.php
index 39c1a2d113e26..a7d9b46bb641e 100644
--- a/src/Symfony/Component/Lock/Store/MongoDbStore.php
+++ b/src/Symfony/Component/Lock/Store/MongoDbStore.php
@@ -229,7 +229,7 @@ public function save(Key $key)
      * @throws LockStorageException
      * @throws LockExpiredException
      */
-    public function putOffExpiration(Key $key, $ttl)
+    public function putOffExpiration(Key $key, float $ttl)
     {
         $key->reduceLifetime($ttl);
 
diff --git a/src/Symfony/Component/Messenger/HandleTrait.php b/src/Symfony/Component/Messenger/HandleTrait.php
index 72ac94ef27fd7..c0b5991fb45f0 100644
--- a/src/Symfony/Component/Messenger/HandleTrait.php
+++ b/src/Symfony/Component/Messenger/HandleTrait.php
@@ -34,7 +34,7 @@ trait HandleTrait
      *
      * @return mixed The handler returned value
      */
-    private function handle($message)
+    private function handle(object $message)
     {
         if (!$this->messageBus instanceof MessageBusInterface) {
             throw new LogicException(sprintf('You must provide a "%s" instance in the "%s::$messageBus" property, "%s" given.', MessageBusInterface::class, static::class, get_debug_type($this->messageBus)));
diff --git a/src/Symfony/Component/Messenger/MessageBus.php b/src/Symfony/Component/Messenger/MessageBus.php
index 4819b7218abd6..1dbc3730a529a 100644
--- a/src/Symfony/Component/Messenger/MessageBus.php
+++ b/src/Symfony/Component/Messenger/MessageBus.php
@@ -59,11 +59,8 @@ public function getIterator(): \Traversable
     /**
      * {@inheritdoc}
      */
-    public function dispatch($message, array $stamps = []): Envelope
+    public function dispatch(object $message, array $stamps = []): Envelope
     {
-        if (!\is_object($message)) {
-            throw new \TypeError(sprintf('Invalid argument provided to "%s()": expected object, but got "%s".', __METHOD__, get_debug_type($message)));
-        }
         $envelope = Envelope::wrap($message, $stamps);
         $middlewareIterator = $this->middlewareAggregate->getIterator();
 
diff --git a/src/Symfony/Component/Messenger/MessageBusInterface.php b/src/Symfony/Component/Messenger/MessageBusInterface.php
index 4e61346bb7309..f1dbe0ad3800c 100644
--- a/src/Symfony/Component/Messenger/MessageBusInterface.php
+++ b/src/Symfony/Component/Messenger/MessageBusInterface.php
@@ -24,5 +24,5 @@ interface MessageBusInterface
      * @param object|Envelope  $message The message or the message pre-wrapped in an envelope
      * @param StampInterface[] $stamps
      */
-    public function dispatch($message, array $stamps = []): Envelope;
+    public function dispatch(object $message, array $stamps = []): Envelope;
 }
diff --git a/src/Symfony/Component/Messenger/RoutableMessageBus.php b/src/Symfony/Component/Messenger/RoutableMessageBus.php
index 8b7bedf7316e1..ece1478892698 100644
--- a/src/Symfony/Component/Messenger/RoutableMessageBus.php
+++ b/src/Symfony/Component/Messenger/RoutableMessageBus.php
@@ -34,7 +34,7 @@ public function __construct(ContainerInterface $busLocator, MessageBusInterface
         $this->fallbackBus = $fallbackBus;
     }
 
-    public function dispatch($envelope, array $stamps = []): Envelope
+    public function dispatch(object $envelope, array $stamps = []): Envelope
     {
         if (!$envelope instanceof Envelope) {
             throw new InvalidArgumentException('Messages passed to RoutableMessageBus::dispatch() must be inside an Envelope.');
diff --git a/src/Symfony/Component/Messenger/Tests/MessageBusTest.php b/src/Symfony/Component/Messenger/Tests/MessageBusTest.php
index 703a47219a96f..fc0d638bb1ca3 100644
--- a/src/Symfony/Component/Messenger/Tests/MessageBusTest.php
+++ b/src/Symfony/Component/Messenger/Tests/MessageBusTest.php
@@ -32,13 +32,6 @@ public function testItHasTheRightInterface()
         $this->assertInstanceOf(MessageBusInterface::class, $bus);
     }
 
-    public function testItDispatchInvalidMessageType()
-    {
-        $this->expectException(\TypeError::class);
-        $this->expectExceptionMessage('Invalid argument provided to "Symfony\Component\Messenger\MessageBus::dispatch()": expected object, but got "string".');
-        (new MessageBus())->dispatch('wrong');
-    }
-
     public function testItCallsMiddleware()
     {
         $message = new DummyMessage('Hello');
diff --git a/src/Symfony/Component/Messenger/TraceableMessageBus.php b/src/Symfony/Component/Messenger/TraceableMessageBus.php
index 39edaa8c5b034..ba3aa6fc4209f 100644
--- a/src/Symfony/Component/Messenger/TraceableMessageBus.php
+++ b/src/Symfony/Component/Messenger/TraceableMessageBus.php
@@ -27,7 +27,7 @@ public function __construct(MessageBusInterface $decoratedBus)
     /**
      * {@inheritdoc}
      */
-    public function dispatch($message, array $stamps = []): Envelope
+    public function dispatch(object $message, array $stamps = []): Envelope
     {
         $envelope = Envelope::wrap($message, $stamps);
         $context = [
diff --git a/src/Symfony/Component/Messenger/Transport/Serialization/Normalizer/FlattenExceptionNormalizer.php b/src/Symfony/Component/Messenger/Transport/Serialization/Normalizer/FlattenExceptionNormalizer.php
index f7d909f2c599d..9be0bf178ea4f 100644
--- a/src/Symfony/Component/Messenger/Transport/Serialization/Normalizer/FlattenExceptionNormalizer.php
+++ b/src/Symfony/Component/Messenger/Transport/Serialization/Normalizer/FlattenExceptionNormalizer.php
@@ -32,7 +32,7 @@ final class FlattenExceptionNormalizer implements DenormalizerInterface, Context
      *
      * @throws InvalidArgumentException
      */
-    public function normalize($object, $format = null, array $context = [])
+    public function normalize($object, string $format = null, array $context = [])
     {
         $normalized = [
             'message' => $object->getMessage(),
@@ -54,7 +54,7 @@ public function normalize($object, $format = null, array $context = [])
     /**
      * {@inheritdoc}
      */
-    public function supportsNormalization($data, $format = null, array $context = [])
+    public function supportsNormalization($data, string $format = null, array $context = [])
     {
         return $data instanceof FlattenException && ($context[Serializer::MESSENGER_SERIALIZATION_CONTEXT] ?? false);
     }
@@ -62,7 +62,7 @@ public function supportsNormalization($data, $format = null, array $context = []
     /**
      * {@inheritdoc}
      */
-    public function denormalize($data, $type, $format = null, array $context = [])
+    public function denormalize($data, string $type, string $format = null, array $context = [])
     {
         $object = new FlattenException();
 
@@ -93,7 +93,7 @@ public function denormalize($data, $type, $format = null, array $context = [])
     /**
      * {@inheritdoc}
      */
-    public function supportsDenormalization($data, $type, $format = null, array $context = [])
+    public function supportsDenormalization($data, string $type, string $format = null, array $context = [])
     {
         return FlattenException::class === $type && ($context[Serializer::MESSENGER_SERIALIZATION_CONTEXT] ?? false);
     }
diff --git a/src/Symfony/Component/Messenger/composer.json b/src/Symfony/Component/Messenger/composer.json
index 704583c0df4ce..476d8c4e94949 100644
--- a/src/Symfony/Component/Messenger/composer.json
+++ b/src/Symfony/Component/Messenger/composer.json
@@ -32,7 +32,7 @@
         "symfony/http-kernel": "^4.4|^5.0",
         "symfony/process": "^4.4|^5.0",
         "symfony/property-access": "^4.4|^5.0",
-        "symfony/serializer": "^4.4|^5.0",
+        "symfony/serializer": "^5.0",
         "symfony/service-contracts": "^1.1|^2",
         "symfony/stopwatch": "^4.4|^5.0",
         "symfony/validator": "^4.4|^5.0"
@@ -40,7 +40,8 @@
     "conflict": {
         "symfony/event-dispatcher": "<4.4",
         "symfony/framework-bundle": "<4.4",
-        "symfony/http-kernel": "<4.4"
+        "symfony/http-kernel": "<4.4",
+        "symfony/serializer": "<5.0"
     },
     "suggest": {
         "enqueue/messenger-adapter": "For using the php-enqueue library as a transport."
diff --git a/src/Symfony/Component/Mime/Address.php b/src/Symfony/Component/Mime/Address.php
index 373d4236f8152..f52e3fb972465 100644
--- a/src/Symfony/Component/Mime/Address.php
+++ b/src/Symfony/Component/Mime/Address.php
@@ -98,19 +98,20 @@ public static function create($address): self
         if ($address instanceof self) {
             return $address;
         }
-        if (\is_string($address)) {
-            if (false === strpos($address, '<')) {
-                return new self($address);
-            }
 
-            if (!preg_match(self::FROM_STRING_PATTERN, $address, $matches)) {
-                throw new InvalidArgumentException(sprintf('Could not parse "%s" to a "%s" instance.', $address, self::class));
-            }
+        if (!\is_string($address)) {
+            throw new InvalidArgumentException(sprintf('An address can be an instance of Address or a string ("%s" given).', get_debug_type($address)));
+        }
+
+        if (false === strpos($address, '<')) {
+            return new self($address);
+        }
 
-            return new self($matches['addrSpec'], trim($matches['displayName'], ' \'"'));
+        if (!preg_match(self::FROM_STRING_PATTERN, $address, $matches)) {
+            throw new InvalidArgumentException(sprintf('Could not parse "%s" to a "%s" instance.', $address, self::class));
         }
 
-        throw new InvalidArgumentException(sprintf('An address can be an instance of Address or a string ("%s" given).', get_debug_type($address)));
+        return new self($matches['addrSpec'], trim($matches['displayName'], ' \'"'));
     }
 
     /**
diff --git a/src/Symfony/Component/Mime/Part/TextPart.php b/src/Symfony/Component/Mime/Part/TextPart.php
index ff767cc36c4ec..686afbe2eb307 100644
--- a/src/Symfony/Component/Mime/Part/TextPart.php
+++ b/src/Symfony/Component/Mime/Part/TextPart.php
@@ -89,7 +89,7 @@ public function setDisposition(string $disposition)
      *
      * @return $this
      */
-    public function setName($name)
+    public function setName(string $name)
     {
         $this->name = $name;
 
diff --git a/src/Symfony/Component/OptionsResolver/OptionConfigurator.php b/src/Symfony/Component/OptionsResolver/OptionConfigurator.php
index 47f5bea557b7b..62f03d064ace9 100644
--- a/src/Symfony/Component/OptionsResolver/OptionConfigurator.php
+++ b/src/Symfony/Component/OptionsResolver/OptionConfigurator.php
@@ -28,8 +28,6 @@ public function __construct(string $name, OptionsResolver $resolver)
     /**
      * Adds allowed types for this option.
      *
-     * @param string ...$types One or more accepted types
-     *
      * @return $this
      *
      * @throws AccessException If called from a lazy option or normalizer
@@ -100,8 +98,6 @@ public function deprecated(string $package, string $version, $message = 'The opt
     /**
      * Sets the normalizer for this option.
      *
-     * @param \Closure $normalizer The normalizer
-     *
      * @return $this
      *
      * @throws AccessException If called from a lazy option or normalizer
diff --git a/src/Symfony/Component/OptionsResolver/OptionsResolver.php b/src/Symfony/Component/OptionsResolver/OptionsResolver.php
index 4b5b23c0e0865..506f95e99d1be 100644
--- a/src/Symfony/Component/OptionsResolver/OptionsResolver.php
+++ b/src/Symfony/Component/OptionsResolver/OptionsResolver.php
@@ -270,8 +270,6 @@ public function setDefaults(array $defaults)
      * Returns true if {@link setDefault()} was called for this option.
      * An option is also considered set if it was set to null.
      *
-     * @param string $option The option name
-     *
      * @return bool Whether a default value is set
      */
     public function hasDefault(string $option)
@@ -307,8 +305,6 @@ public function setRequired($optionNames)
      *
      * An option is required if it was passed to {@link setRequired()}.
      *
-     * @param string $option The name of the option
-     *
      * @return bool Whether the option is required
      */
     public function isRequired(string $option)
@@ -335,8 +331,6 @@ public function getRequiredOptions()
      * to {@link setDefault()}. This option must be passed explicitly to
      * {@link resolve()}, otherwise an exception will be thrown.
      *
-     * @param string $option The name of the option
-     *
      * @return bool Whether the option is missing
      */
     public function isMissing(string $option)
@@ -388,8 +382,6 @@ public function setDefined($optionNames)
      * Returns true for any option passed to {@link setDefault()},
      * {@link setRequired()} or {@link setDefined()}.
      *
-     * @param string $option The option name
-     *
      * @return bool Whether the option is defined
      */
     public function isDefined(string $option)
@@ -502,8 +494,6 @@ public function isDeprecated(string $option): bool
      *
      * The resolved option value is set to the return value of the closure.
      *
-     * @param string $option The option name
-     *
      * @return $this
      *
      * @throws UndefinedOptionsException If the option is undefined
@@ -668,7 +658,6 @@ public function addAllowedValues(string $option, $allowedValues)
      * acceptable. Additionally, fully-qualified class or interface names may
      * be passed.
      *
-     * @param string          $option       The option name
      * @param string|string[] $allowedTypes One or more accepted types
      *
      * @return $this
@@ -703,7 +692,6 @@ public function setAllowedTypes(string $option, $allowedTypes)
      * acceptable. Additionally, fully-qualified class or interface names may
      * be passed.
      *
-     * @param string          $option       The option name
      * @param string|string[] $allowedTypes One or more accepted types
      *
      * @return $this
@@ -905,8 +893,7 @@ public function resolve(array $options = [])
     /**
      * Returns the resolved value of an option.
      *
-     * @param string $option             The option name
-     * @param bool   $triggerDeprecation Whether to trigger the deprecation or not (true by default)
+     * @param bool $triggerDeprecation Whether to trigger the deprecation or not (true by default)
      *
      * @return mixed The option value
      *
diff --git a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
index 0c2b515832711..85c530ef2fe9a 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyAccessor.php
@@ -623,10 +623,8 @@ private function getWriteInfo(string $class, string $property, $value): Property
 
     /**
      * Returns whether a property is writable in the given object.
-     *
-     * @param object $object The object to write to
      */
-    private function isPropertyWritable($object, string $property): bool
+    private function isPropertyWritable(object $object, string $property): bool
     {
         if (!\is_object($object)) {
             return false;
diff --git a/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php b/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
index e20045ed53cc6..5aa3afc79a40b 100644
--- a/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
+++ b/src/Symfony/Component/PropertyAccess/PropertyPathBuilder.php
@@ -63,8 +63,6 @@ public function append($path, int $offset = 0, int $length = 0)
 
     /**
      * Appends an index element to the current path.
-     *
-     * @param string $name The name of the appended index
      */
     public function appendIndex(string $name)
     {
@@ -74,8 +72,6 @@ public function appendIndex(string $name)
 
     /**
      * Appends a property element to the current path.
-     *
-     * @param string $name The name of the appended property
      */
     public function appendProperty(string $name)
     {
@@ -86,9 +82,6 @@ public function appendProperty(string $name)
     /**
      * Removes elements from the current path.
      *
-     * @param int $offset The offset at which to remove
-     * @param int $length The length of the removed piece
-     *
      * @throws OutOfBoundsException if offset is invalid
      */
     public function remove(int $offset, int $length = 1)
@@ -141,9 +134,6 @@ public function replace(int $offset, int $length, $path, int $pathOffset = 0, in
     /**
      * Replaces a property element by an index element.
      *
-     * @param int    $offset The offset at which to replace
-     * @param string $name   The new name of the element. Optional
-     *
      * @throws OutOfBoundsException If the offset is invalid
      */
     public function replaceByIndex(int $offset, string $name = null)
@@ -162,9 +152,6 @@ public function replaceByIndex(int $offset, string $name = null)
     /**
      * Replaces an index element by a property element.
      *
-     * @param int    $offset The offset at which to replace
-     * @param string $name   The new name of the element. Optional
-     *
      * @throws OutOfBoundsException If the offset is invalid
      */
     public function replaceByProperty(int $offset, string $name = null)
diff --git a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestSingularAndPluralProps.php b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestSingularAndPluralProps.php
index 128ba33cb6058..76261d6c3f539 100644
--- a/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestSingularAndPluralProps.php
+++ b/src/Symfony/Component/PropertyAccess/Tests/Fixtures/TestSingularAndPluralProps.php
@@ -28,10 +28,7 @@ public function getEmail(): ?string
         return $this->email;
     }
 
-    /**
-     * @param string|null $email
-     */
-    public function setEmail($email)
+    public function setEmail(?string $email)
     {
         $this->email = $email;
     }
@@ -41,18 +38,12 @@ public function getEmails(): array
         return $this->emails;
     }
 
-    /**
-     * @param string $email
-     */
-    public function addEmail($email)
+    public function addEmail(string $email)
     {
         $this->emails[] = $email;
     }
 
-    /**
-     * @param string $email
-     */
-    public function removeEmail($email)
+    public function removeEmail(string $email)
     {
         $this->emails = array_diff($this->emails, [$email]);
     }
diff --git a/src/Symfony/Component/PropertyInfo/Extractor/ConstructorExtractor.php b/src/Symfony/Component/PropertyInfo/Extractor/ConstructorExtractor.php
index 702251cde3ab5..86dc43f13b9f5 100644
--- a/src/Symfony/Component/PropertyInfo/Extractor/ConstructorExtractor.php
+++ b/src/Symfony/Component/PropertyInfo/Extractor/ConstructorExtractor.php
@@ -34,7 +34,7 @@ public function __construct(iterable $extractors = [])
     /**
      * {@inheritdoc}
      */
-    public function getTypes($class, $property, array $context = [])
+    public function getTypes(string $class, string $property, array $context = [])
     {
         foreach ($this->extractors as $extractor) {
             $value = $extractor->getTypesFromConstructor($class, $property);
diff --git a/src/Symfony/Component/RateLimiter/Exception/RateLimitExceededException.php b/src/Symfony/Component/RateLimiter/Exception/RateLimitExceededException.php
index 0cb10c750befe..c75b3eeec4f62 100644
--- a/src/Symfony/Component/RateLimiter/Exception/RateLimitExceededException.php
+++ b/src/Symfony/Component/RateLimiter/Exception/RateLimitExceededException.php
@@ -22,7 +22,7 @@ class RateLimitExceededException extends \RuntimeException
 {
     private $rateLimit;
 
-    public function __construct(RateLimit $rateLimit, $code = 0, \Throwable $previous = null)
+    public function __construct(RateLimit $rateLimit, int $code = 0, \Throwable $previous = null)
     {
         parent::__construct('Rate Limit Exceeded', $code, $previous);
 
diff --git a/src/Symfony/Component/Routing/Annotation/Route.php b/src/Symfony/Component/Routing/Annotation/Route.php
index f51b74c38727c..e938f45b6daee 100644
--- a/src/Symfony/Component/Routing/Annotation/Route.php
+++ b/src/Symfony/Component/Routing/Annotation/Route.php
@@ -132,7 +132,7 @@ public function __construct(
         }
     }
 
-    public function setPath($path)
+    public function setPath(string $path)
     {
         $this->path = $path;
     }
@@ -152,7 +152,7 @@ public function getLocalizedPaths(): array
         return $this->localizedPaths;
     }
 
-    public function setHost($pattern)
+    public function setHost(string $pattern)
     {
         $this->host = $pattern;
     }
@@ -162,7 +162,7 @@ public function getHost()
         return $this->host;
     }
 
-    public function setName($name)
+    public function setName(string $name)
     {
         $this->name = $name;
     }
@@ -172,7 +172,7 @@ public function getName()
         return $this->name;
     }
 
-    public function setRequirements($requirements)
+    public function setRequirements(array $requirements)
     {
         $this->requirements = $requirements;
     }
@@ -182,7 +182,7 @@ public function getRequirements()
         return $this->requirements;
     }
 
-    public function setOptions($options)
+    public function setOptions(array $options)
     {
         $this->options = $options;
     }
@@ -192,7 +192,7 @@ public function getOptions()
         return $this->options;
     }
 
-    public function setDefaults($defaults)
+    public function setDefaults(array $defaults)
     {
         $this->defaults = $defaults;
     }
@@ -222,7 +222,7 @@ public function getMethods()
         return $this->methods;
     }
 
-    public function setCondition($condition)
+    public function setCondition(?string $condition)
     {
         $this->condition = $condition;
     }
diff --git a/src/Symfony/Component/Routing/Loader/Configurator/RouteConfigurator.php b/src/Symfony/Component/Routing/Loader/Configurator/RouteConfigurator.php
index fcb377182e359..bb6ce267a78a7 100644
--- a/src/Symfony/Component/Routing/Loader/Configurator/RouteConfigurator.php
+++ b/src/Symfony/Component/Routing/Loader/Configurator/RouteConfigurator.php
@@ -24,7 +24,7 @@ class RouteConfigurator
 
     protected $parentConfigurator;
 
-    public function __construct(RouteCollection $collection, $route, string $name = '', CollectionConfigurator $parentConfigurator = null, array $prefixes = null)
+    public function __construct(RouteCollection $collection, RouteCollection $route, string $name = '', CollectionConfigurator $parentConfigurator = null, array $prefixes = null)
     {
         $this->collection = $collection;
         $this->route = $route;
diff --git a/src/Symfony/Component/Routing/Loader/XmlFileLoader.php b/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
index 355b4f486c8bd..7f1cb08182a87 100644
--- a/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/XmlFileLoader.php
@@ -69,10 +69,6 @@ public function load($file, string $type = null)
     /**
      * Parses a node from a loaded XML file.
      *
-     * @param \DOMElement $node Element to parse
-     * @param string      $path Full path of the XML file being processed
-     * @param string      $file Loaded file name
-     *
      * @throws \InvalidArgumentException When the XML is invalid
      */
     protected function parseNode(RouteCollection $collection, \DOMElement $node, string $path, string $file)
@@ -104,9 +100,6 @@ public function supports($resource, string $type = null)
     /**
      * Parses a route and adds it to the RouteCollection.
      *
-     * @param \DOMElement $node Element to parse that represents a Route
-     * @param string      $path Full path of the XML file being processed
-     *
      * @throws \InvalidArgumentException When the XML is invalid
      */
     protected function parseRoute(RouteCollection $collection, \DOMElement $node, string $path)
@@ -144,10 +137,6 @@ protected function parseRoute(RouteCollection $collection, \DOMElement $node, st
     /**
      * Parses an import and adds the routes in the resource to the RouteCollection.
      *
-     * @param \DOMElement $node Element to parse that represents a Route
-     * @param string      $path Full path of the XML file being processed
-     * @param string      $file Loaded file name
-     *
      * @throws \InvalidArgumentException When the XML is invalid
      */
     protected function parseImport(RouteCollection $collection, \DOMElement $node, string $path, string $file)
@@ -220,10 +209,6 @@ protected function parseImport(RouteCollection $collection, \DOMElement $node, s
     }
 
     /**
-     * Loads an XML file.
-     *
-     * @param string $file An XML file path
-     *
      * @return \DOMDocument
      *
      * @throws \InvalidArgumentException When loading of XML file fails because of syntax errors
diff --git a/src/Symfony/Component/Routing/Loader/YamlFileLoader.php b/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
index b236e4b54e8f6..4a0e479d310b3 100644
--- a/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/Routing/Loader/YamlFileLoader.php
@@ -106,10 +106,6 @@ public function supports($resource, string $type = null)
 
     /**
      * Parses a route and adds it to the RouteCollection.
-     *
-     * @param string $name   Route name
-     * @param array  $config Route definition
-     * @param string $path   Full path of the YAML file being processed
      */
     protected function parseRoute(RouteCollection $collection, string $name, array $config, string $path)
     {
@@ -154,10 +150,6 @@ protected function parseRoute(RouteCollection $collection, string $name, array $
 
     /**
      * Parses an import and adds the routes in the resource to the RouteCollection.
-     *
-     * @param array  $config Route definition
-     * @param string $path   Full path of the YAML file being processed
-     * @param string $file   Loaded file name
      */
     protected function parseImport(RouteCollection $collection, array $config, string $path, string $file)
     {
diff --git a/src/Symfony/Component/Routing/Route.php b/src/Symfony/Component/Routing/Route.php
index d4d4b3af804d1..466f18d9f35cc 100644
--- a/src/Symfony/Component/Routing/Route.php
+++ b/src/Symfony/Component/Routing/Route.php
@@ -120,8 +120,6 @@ public function getPath()
     }
 
     /**
-     * Sets the pattern for the path.
-     *
      * @return $this
      */
     public function setPath(string $pattern)
@@ -145,8 +143,6 @@ public function getHost()
     }
 
     /**
-     * Sets the pattern for the host.
-     *
      * @return $this
      */
     public function setHost(?string $pattern)
@@ -270,8 +266,6 @@ public function setOption(string $name, $value)
     }
 
     /**
-     * Get an option value.
-     *
      * @return mixed The option value or null when not given
      */
     public function getOption(string $name)
@@ -280,8 +274,6 @@ public function getOption(string $name)
     }
 
     /**
-     * Checks if an option has been set.
-     *
      * @return bool true if the option is set, false otherwise
      */
     public function hasOption(string $name)
@@ -325,8 +317,6 @@ public function addDefaults(array $defaults)
     }
 
     /**
-     * Gets a default value.
-     *
      * @return mixed The default value or null when not given
      */
     public function getDefault(string $name)
@@ -335,8 +325,6 @@ public function getDefault(string $name)
     }
 
     /**
-     * Checks if a default value is set for the given variable.
-     *
      * @return bool true if the default value is set, false otherwise
      */
     public function hasDefault(string $name)
@@ -399,8 +387,6 @@ public function addRequirements(array $requirements)
     }
 
     /**
-     * Returns the requirement for the given key.
-     *
      * @return string|null The regex or null when not given
      */
     public function getRequirement(string $key)
@@ -409,8 +395,6 @@ public function getRequirement(string $key)
     }
 
     /**
-     * Checks if a requirement is set for the given key.
-     *
      * @return bool true if a requirement is specified, false otherwise
      */
     public function hasRequirement(string $key)
@@ -419,8 +403,6 @@ public function hasRequirement(string $key)
     }
 
     /**
-     * Sets a requirement for the given key.
-     *
      * @return $this
      */
     public function setRequirement(string $key, string $regex)
@@ -444,8 +426,6 @@ public function getCondition()
     }
 
     /**
-     * Sets the condition.
-     *
      * @return $this
      */
     public function setCondition(?string $condition)
diff --git a/src/Symfony/Component/Security/Http/Authenticator/Passport/Credentials/CustomCredentials.php b/src/Symfony/Component/Security/Http/Authenticator/Passport/Credentials/CustomCredentials.php
index f0407107e6d4d..18c8587c8b36b 100644
--- a/src/Symfony/Component/Security/Http/Authenticator/Passport/Credentials/CustomCredentials.php
+++ b/src/Symfony/Component/Security/Http/Authenticator/Passport/Credentials/CustomCredentials.php
@@ -32,7 +32,7 @@ class CustomCredentials implements CredentialsInterface
      * @param callable $customCredentialsChecker the check function. If this function does not return `true`, a
      *                                           BadCredentialsException is thrown. You may also throw a more
      *                                           specific exception in the function.
-     * @param          $credentials
+     * @param mixed    $credentials
      */
     public function __construct(callable $customCredentialsChecker, $credentials)
     {
diff --git a/src/Symfony/Component/Serializer/Annotation/Groups.php b/src/Symfony/Component/Serializer/Annotation/Groups.php
index 0c71e177d7433..628968f8b8f21 100644
--- a/src/Symfony/Component/Serializer/Annotation/Groups.php
+++ b/src/Symfony/Component/Serializer/Annotation/Groups.php
@@ -42,8 +42,8 @@ public function __construct(array $groups)
         }
 
         foreach ($groups as $group) {
-            if (!\is_string($group)) {
-                throw new InvalidArgumentException(sprintf('Parameter of annotation "%s" must be a string or an array of strings.', static::class));
+            if (!\is_string($group) || '' === $group) {
+                throw new InvalidArgumentException(sprintf('Parameter of annotation "%s" must be a string or an array of non-empty strings.', static::class));
             }
         }
 
diff --git a/src/Symfony/Component/Serializer/Tests/Normalizer/UnwrappinDenormalizerTest.php b/src/Symfony/Component/Serializer/Tests/Normalizer/UnwrappinDenormalizerTest.php
index 8d282656504fb..25063b8620d90 100644
--- a/src/Symfony/Component/Serializer/Tests/Normalizer/UnwrappinDenormalizerTest.php
+++ b/src/Symfony/Component/Serializer/Tests/Normalizer/UnwrappinDenormalizerTest.php
@@ -34,9 +34,9 @@ protected function setUp(): void
 
     public function testSupportsNormalization()
     {
-        $this->assertTrue($this->denormalizer->supportsDenormalization([], new \stdClass(), 'any', [UnwrappingDenormalizer::UNWRAP_PATH => '[baz][inner]']));
-        $this->assertFalse($this->denormalizer->supportsDenormalization([], new \stdClass(), 'any', [UnwrappingDenormalizer::UNWRAP_PATH => '[baz][inner]', 'unwrapped' => true]));
-        $this->assertFalse($this->denormalizer->supportsDenormalization([], new \stdClass(), 'any', []));
+        $this->assertTrue($this->denormalizer->supportsDenormalization([], 'stdClass', 'any', [UnwrappingDenormalizer::UNWRAP_PATH => '[baz][inner]']));
+        $this->assertFalse($this->denormalizer->supportsDenormalization([], 'stdClass', 'any', [UnwrappingDenormalizer::UNWRAP_PATH => '[baz][inner]', 'unwrapped' => true]));
+        $this->assertFalse($this->denormalizer->supportsDenormalization([], 'stdClass', 'any', []));
     }
 
     public function testDenormalize()
diff --git a/src/Symfony/Component/Templating/PhpEngine.php b/src/Symfony/Component/Templating/PhpEngine.php
index ab6b7d30e3030..b2920ab8afecc 100644
--- a/src/Symfony/Component/Templating/PhpEngine.php
+++ b/src/Symfony/Component/Templating/PhpEngine.php
@@ -272,8 +272,6 @@ public function get(string $name)
 
     /**
      * Decorates the current template with another one.
-     *
-     * @param string $template The decorator logical name
      */
     public function extend(string $template)
     {
diff --git a/src/Symfony/Component/Translation/Extractor/ChainExtractor.php b/src/Symfony/Component/Translation/Extractor/ChainExtractor.php
index 6b6e18277d04a..95dcf157c54c7 100644
--- a/src/Symfony/Component/Translation/Extractor/ChainExtractor.php
+++ b/src/Symfony/Component/Translation/Extractor/ChainExtractor.php
@@ -29,8 +29,6 @@ class ChainExtractor implements ExtractorInterface
 
     /**
      * Adds a loader to the translation extractor.
-     *
-     * @param string $format The format of the loader
      */
     public function addExtractor(string $format, ExtractorInterface $extractor)
     {
diff --git a/src/Symfony/Component/Translation/Extractor/ExtractorInterface.php b/src/Symfony/Component/Translation/Extractor/ExtractorInterface.php
index f8c1c82a23128..e8ab05ea5e1c0 100644
--- a/src/Symfony/Component/Translation/Extractor/ExtractorInterface.php
+++ b/src/Symfony/Component/Translation/Extractor/ExtractorInterface.php
@@ -30,8 +30,6 @@ public function extract($resource, MessageCatalogue $catalogue);
 
     /**
      * Sets the prefix that should be used for new found messages.
-     *
-     * @param string $prefix The prefix
      */
     public function setPrefix(string $prefix);
 }
diff --git a/src/Symfony/Component/Translation/Loader/CsvFileLoader.php b/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
index 25ac2f5662395..8d5d4db9a721f 100644
--- a/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/CsvFileLoader.php
@@ -27,7 +27,7 @@ class CsvFileLoader extends FileLoader
     /**
      * {@inheritdoc}
      */
-    protected function loadResource($resource)
+    protected function loadResource(string $resource)
     {
         $messages = [];
 
diff --git a/src/Symfony/Component/Translation/Loader/FileLoader.php b/src/Symfony/Component/Translation/Loader/FileLoader.php
index 2ffba392d54d1..4725ea6d62a7d 100644
--- a/src/Symfony/Component/Translation/Loader/FileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/FileLoader.php
@@ -55,11 +55,9 @@ public function load($resource, string $locale, string $domain = 'messages')
     }
 
     /**
-     * @param string $resource
-     *
      * @return array
      *
      * @throws InvalidResourceException if stream content has an invalid format
      */
-    abstract protected function loadResource($resource);
+    abstract protected function loadResource(string $resource);
 }
diff --git a/src/Symfony/Component/Translation/Loader/IniFileLoader.php b/src/Symfony/Component/Translation/Loader/IniFileLoader.php
index 11d9b272e0a39..7398f777814ab 100644
--- a/src/Symfony/Component/Translation/Loader/IniFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/IniFileLoader.php
@@ -21,7 +21,7 @@ class IniFileLoader extends FileLoader
     /**
      * {@inheritdoc}
      */
-    protected function loadResource($resource)
+    protected function loadResource(string $resource)
     {
         return parse_ini_file($resource, true);
     }
diff --git a/src/Symfony/Component/Translation/Loader/JsonFileLoader.php b/src/Symfony/Component/Translation/Loader/JsonFileLoader.php
index 8a8996b0d209e..5aefba07229f6 100644
--- a/src/Symfony/Component/Translation/Loader/JsonFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/JsonFileLoader.php
@@ -23,7 +23,7 @@ class JsonFileLoader extends FileLoader
     /**
      * {@inheritdoc}
      */
-    protected function loadResource($resource)
+    protected function loadResource(string $resource)
     {
         $messages = [];
         if ($data = file_get_contents($resource)) {
diff --git a/src/Symfony/Component/Translation/Loader/MoFileLoader.php b/src/Symfony/Component/Translation/Loader/MoFileLoader.php
index accd023ab50c6..654331a2b136c 100644
--- a/src/Symfony/Component/Translation/Loader/MoFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/MoFileLoader.php
@@ -41,7 +41,7 @@ class MoFileLoader extends FileLoader
      *
      * {@inheritdoc}
      */
-    protected function loadResource($resource)
+    protected function loadResource(string $resource)
     {
         $stream = fopen($resource, 'r');
 
diff --git a/src/Symfony/Component/Translation/Loader/PhpFileLoader.php b/src/Symfony/Component/Translation/Loader/PhpFileLoader.php
index c361d5293cc0f..85f10902b152d 100644
--- a/src/Symfony/Component/Translation/Loader/PhpFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/PhpFileLoader.php
@@ -23,7 +23,7 @@ class PhpFileLoader extends FileLoader
     /**
      * {@inheritdoc}
      */
-    protected function loadResource($resource)
+    protected function loadResource(string $resource)
     {
         if ([] === self::$cache && \function_exists('opcache_invalidate') && filter_var(ini_get('opcache.enable'), \FILTER_VALIDATE_BOOLEAN) && (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) || filter_var(ini_get('opcache.enable_cli'), \FILTER_VALIDATE_BOOLEAN))) {
             self::$cache = null;
diff --git a/src/Symfony/Component/Translation/Loader/PoFileLoader.php b/src/Symfony/Component/Translation/Loader/PoFileLoader.php
index 5e460fbfb84ff..ee143e20323cf 100644
--- a/src/Symfony/Component/Translation/Loader/PoFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/PoFileLoader.php
@@ -60,7 +60,7 @@ class PoFileLoader extends FileLoader
      *
      * {@inheritdoc}
      */
-    protected function loadResource($resource)
+    protected function loadResource(string $resource)
     {
         $stream = fopen($resource, 'r');
 
diff --git a/src/Symfony/Component/Translation/Loader/YamlFileLoader.php b/src/Symfony/Component/Translation/Loader/YamlFileLoader.php
index b03c7b77d0209..8588e186ad1a8 100644
--- a/src/Symfony/Component/Translation/Loader/YamlFileLoader.php
+++ b/src/Symfony/Component/Translation/Loader/YamlFileLoader.php
@@ -29,7 +29,7 @@ class YamlFileLoader extends FileLoader
     /**
      * {@inheritdoc}
      */
-    protected function loadResource($resource)
+    protected function loadResource(string $resource)
     {
         if (null === $this->yamlParser) {
             if (!class_exists(\Symfony\Component\Yaml\Parser::class)) {
diff --git a/src/Symfony/Component/Translation/MetadataAwareInterface.php b/src/Symfony/Component/Translation/MetadataAwareInterface.php
index d157a072eb845..bd9a39bc72faa 100644
--- a/src/Symfony/Component/Translation/MetadataAwareInterface.php
+++ b/src/Symfony/Component/Translation/MetadataAwareInterface.php
@@ -25,9 +25,6 @@ interface MetadataAwareInterface
      * domain and then by key. Passing an empty key will return an array with all
      * metadata for the given domain.
      *
-     * @param string $key    The key
-     * @param string $domain The domain name
-     *
      * @return mixed The value that was set or an array with the domains/keys or null
      */
     public function getMetadata(string $key = '', string $domain = 'messages');
@@ -35,20 +32,15 @@ public function getMetadata(string $key = '', string $domain = 'messages');
     /**
      * Adds metadata to a message domain.
      *
-     * @param string $key    The key
-     * @param mixed  $value  The value
-     * @param string $domain The domain name
+     * @param mixed $value
      */
-    public function setMetadata(string $key, $value, string $domain = 'messages');
+    public function setMetadata(string $key, mixed $value, string $domain = 'messages');
 
     /**
      * Deletes metadata for the given key and domain.
      *
      * Passing an empty domain will delete all metadata. Passing an empty key will
      * delete all metadata for the given domain.
-     *
-     * @param string $key    The key
-     * @param string $domain The domain name
      */
     public function deleteMetadata(string $key = '', string $domain = 'messages');
 }
diff --git a/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php b/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
index 2de3164876450..2d890c8c3616a 100644
--- a/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
+++ b/src/Symfony/Component/Translation/Tests/TranslatorCacheTest.php
@@ -320,7 +320,7 @@ private function createFailingLoader(): LoaderInterface
 
 class StaleResource implements SelfCheckingResourceInterface
 {
-    public function isFresh($timestamp): bool
+    public function isFresh(int $timestamp): bool
     {
         return false;
     }
diff --git a/src/Symfony/Component/Translation/Writer/TranslationWriter.php b/src/Symfony/Component/Translation/Writer/TranslationWriter.php
index e0260b7a30593..0a349b824689f 100644
--- a/src/Symfony/Component/Translation/Writer/TranslationWriter.php
+++ b/src/Symfony/Component/Translation/Writer/TranslationWriter.php
@@ -27,10 +27,8 @@ class TranslationWriter implements TranslationWriterInterface
 
     /**
      * Adds a dumper to the writer.
-     *
-     * @param string $format The format of the dumper
      */
-    public function addDumper($format, DumperInterface $dumper)
+    public function addDumper(string $format, DumperInterface $dumper)
     {
         $this->dumpers[$format] = $dumper;
     }
diff --git a/src/Symfony/Component/Validator/Constraint.php b/src/Symfony/Component/Validator/Constraint.php
index 4a9af65ef77b5..97a2518c5fd8f 100644
--- a/src/Symfony/Component/Validator/Constraint.php
+++ b/src/Symfony/Component/Validator/Constraint.php
@@ -61,13 +61,11 @@ abstract class Constraint
     /**
      * Returns the name of the given error code.
      *
-     * @param string $errorCode The error code
-     *
      * @return string The name of the error code
      *
      * @throws InvalidArgumentException If the error code does not exist
      */
-    public static function getErrorName($errorCode)
+    public static function getErrorName(string $errorCode)
     {
         if (!isset(static::$errorNames[$errorCode])) {
             throw new InvalidArgumentException(sprintf('The error code "%s" does not exist for constraint of type "%s".', $errorCode, static::class));
@@ -203,8 +201,6 @@ public function __set(string $option, $value)
      * this method will be called at most once per constraint instance and
      * option name.
      *
-     * @param string $option The option name
-     *
      * @return mixed The value of the option
      *
      * @throws InvalidOptionsException If an invalid option name is given
@@ -223,8 +219,6 @@ public function __get(string $option)
     }
 
     /**
-     * @param string $option The option name
-     *
      * @return bool
      */
     public function __isset(string $option)
@@ -234,10 +228,8 @@ public function __isset(string $option)
 
     /**
      * Adds the given group if this constraint is in the Default group.
-     *
-     * @param string $group
      */
-    public function addImplicitGroupName($group)
+    public function addImplicitGroupName(string $group)
     {
         if (\in_array(self::DEFAULT_GROUP, $this->groups) && !\in_array($group, $this->groups)) {
             $this->groups[] = $group;
diff --git a/src/Symfony/Component/Validator/Constraints/Composite.php b/src/Symfony/Component/Validator/Constraints/Composite.php
index 0d9bb8ecfe663..b24da39d22855 100644
--- a/src/Symfony/Component/Validator/Constraints/Composite.php
+++ b/src/Symfony/Component/Validator/Constraints/Composite.php
@@ -114,10 +114,8 @@ public function __construct($options = null)
      * {@inheritdoc}
      *
      * Implicit group names are forwarded to nested constraints.
-     *
-     * @param string $group
      */
-    public function addImplicitGroupName($group)
+    public function addImplicitGroupName(string $group)
     {
         parent::addImplicitGroupName($group);
 
diff --git a/src/Symfony/Component/Validator/Constraints/IsbnValidator.php b/src/Symfony/Component/Validator/Constraints/IsbnValidator.php
index 78671004984b5..d015a1df7af50 100644
--- a/src/Symfony/Component/Validator/Constraints/IsbnValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/IsbnValidator.php
@@ -95,7 +95,7 @@ public function validate($value, Constraint $constraint)
         }
     }
 
-    protected function validateIsbn10($isbn)
+    protected function validateIsbn10(string $isbn)
     {
         // Choose an algorithm so that ERROR_INVALID_CHARACTERS is preferred
         // over ERROR_TOO_SHORT/ERROR_TOO_LONG
@@ -135,7 +135,7 @@ protected function validateIsbn10($isbn)
         return 0 === $checkSum % 11 ? true : Isbn::CHECKSUM_FAILED_ERROR;
     }
 
-    protected function validateIsbn13($isbn)
+    protected function validateIsbn13(string $isbn)
     {
         // Error priority:
         // 1. ERROR_INVALID_CHARACTERS
@@ -169,7 +169,7 @@ protected function validateIsbn13($isbn)
         return 0 === $checkSum % 10 ? true : Isbn::CHECKSUM_FAILED_ERROR;
     }
 
-    protected function getMessage($constraint, $type = null)
+    protected function getMessage(Isbn $constraint, string $type = null)
     {
         if (null !== $constraint->message) {
             return $constraint->message;
diff --git a/src/Symfony/Component/Validator/Constraints/Valid.php b/src/Symfony/Component/Validator/Constraints/Valid.php
index 312ab884486c3..9ee69fdd47bc1 100644
--- a/src/Symfony/Component/Validator/Constraints/Valid.php
+++ b/src/Symfony/Component/Validator/Constraints/Valid.php
@@ -37,7 +37,7 @@ public function __get(string $option)
     /**
      * {@inheritdoc}
      */
-    public function addImplicitGroupName($group)
+    public function addImplicitGroupName(string $group)
     {
         if (null !== $this->groups) {
             parent::addImplicitGroupName($group);
diff --git a/src/Symfony/Component/Validator/Test/ConstraintValidatorTestCase.php b/src/Symfony/Component/Validator/Test/ConstraintValidatorTestCase.php
index 3f30ebb45bdba..3a4d2a198d2bd 100644
--- a/src/Symfony/Component/Validator/Test/ConstraintValidatorTestCase.php
+++ b/src/Symfony/Component/Validator/Test/ConstraintValidatorTestCase.php
@@ -91,7 +91,7 @@ protected function tearDown(): void
         $this->restoreDefaultTimezone();
     }
 
-    protected function setDefaultTimezone($defaultTimezone)
+    protected function setDefaultTimezone(?string $defaultTimezone)
     {
         // Make sure this method can not be called twice before calling
         // also restoreDefaultTimezone()
@@ -168,7 +168,7 @@ protected function createContext()
         return $context;
     }
 
-    protected function setGroup($group)
+    protected function setGroup(?string $group)
     {
         $this->group = $group;
         $this->context->setGroup($group);
@@ -207,7 +207,7 @@ protected function setRoot($root)
         $this->validator->initialize($this->context);
     }
 
-    protected function setPropertyPath($propertyPath)
+    protected function setPropertyPath(string $propertyPath)
     {
         $this->propertyPath = $propertyPath;
         $this->context->setNode($this->value, $this->object, $this->metadata, $this->propertyPath);
@@ -219,7 +219,7 @@ protected function expectNoValidate()
         $validator->expectNoValidate();
     }
 
-    protected function expectValidateAt($i, $propertyPath, $value, $group)
+    protected function expectValidateAt(int $i, string $propertyPath, $value, $group)
     {
         $validator = $this->context->getValidator()->inContext($this->context);
         $validator->expectValidation($i, $propertyPath, $value, $group, function ($passedConstraints) {
@@ -254,7 +254,7 @@ protected function expectFailingValueValidation(int $i, $value, array $constrain
         }, $violation);
     }
 
-    protected function expectValidateValueAt($i, $propertyPath, $value, $constraints, $group = null)
+    protected function expectValidateValueAt(int $i, string $propertyPath, $value, $constraints, $group = null)
     {
         $contextualValidator = $this->context->getValidator()->inContext($this->context);
         $contextualValidator->expectValidation($i, $propertyPath, $value, $group, function ($passedConstraints) use ($constraints) {
@@ -332,7 +332,7 @@ public function atPath(string $path)
         return $this;
     }
 
-    public function setParameter(string $key, $value)
+    public function setParameter(string $key, string $value)
     {
         $this->parameters[$key] = $value;
 
@@ -443,11 +443,11 @@ public function __construct(ExecutionContextInterface $context)
         $this->context = $context;
     }
 
-    public function atPath($path)
+    public function atPath(string $path)
     {
     }
 
-    public function doAtPath($path)
+    public function doAtPath(string $path)
     {
         Assert::assertFalse($this->expectNoValidate, 'No validation calls have been expected.');
 
@@ -485,20 +485,20 @@ public function doValidate($value, $constraints = null, $groups = null)
         return $this;
     }
 
-    public function validateProperty($object, $propertyName, $groups = null)
+    public function validateProperty(object $object, string $propertyName, $groups = null)
     {
     }
 
-    public function doValidateProperty($object, $propertyName, $groups = null)
+    public function doValidateProperty(object $object, string $propertyName, $groups = null)
     {
         return $this;
     }
 
-    public function validatePropertyValue($objectOrClass, $propertyName, $value, $groups = null)
+    public function validatePropertyValue($objectOrClass, string $propertyName, $value, $groups = null)
     {
     }
 
-    public function doValidatePropertyValue($objectOrClass, $propertyName, $value, $groups = null)
+    public function doValidatePropertyValue($objectOrClass, string $propertyName, $value, $groups = null)
     {
         return $this;
     }
@@ -517,7 +517,7 @@ public function expectNoValidate()
         $this->expectNoValidate = true;
     }
 
-    public function expectValidation($call, $propertyPath, $value, $group, $constraints, ConstraintViolationInterface $violation = null)
+    public function expectValidation(string $call, string $propertyPath, $value, $group, callable $constraints, ConstraintViolationInterface $violation = null)
     {
         $this->expectedAtPath[$call] = $propertyPath;
         $this->expectedValidate[$call] = [$value, $group, $constraints, $violation];
diff --git a/src/Symfony/Component/Validator/Validator/ContextualValidatorInterface.php b/src/Symfony/Component/Validator/Validator/ContextualValidatorInterface.php
index a8fce8da44f7c..31a88d115ac2f 100644
--- a/src/Symfony/Component/Validator/Validator/ContextualValidatorInterface.php
+++ b/src/Symfony/Component/Validator/Validator/ContextualValidatorInterface.php
@@ -28,8 +28,6 @@ interface ContextualValidatorInterface
      * If called multiple times, the path will always be reset to the context's
      * original path with the given path appended to it.
      *
-     * @param string $path The path to append
-     *
      * @return $this
      */
     public function atPath(string $path);
diff --git a/src/Symfony/Component/Validator/Validator/RecursiveValidator.php b/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
index 2c961895de178..d57c90847b829 100644
--- a/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
+++ b/src/Symfony/Component/Validator/Validator/RecursiveValidator.php
@@ -97,7 +97,7 @@ public function validate($value, $constraints = null, $groups = null)
     /**
      * {@inheritdoc}
      */
-    public function validateProperty($object, string $propertyName, $groups = null)
+    public function validateProperty(object $object, string $propertyName, $groups = null)
     {
         return $this->startContext($object)
             ->validateProperty($object, $propertyName, $groups)
diff --git a/src/Symfony/Component/Validator/Validator/TraceableValidator.php b/src/Symfony/Component/Validator/Validator/TraceableValidator.php
index 74a922fa4e1e2..fb0a196d89313 100644
--- a/src/Symfony/Component/Validator/Validator/TraceableValidator.php
+++ b/src/Symfony/Component/Validator/Validator/TraceableValidator.php
@@ -105,7 +105,7 @@ public function validate($value, $constraints = null, $groups = null)
     /**
      * {@inheritdoc}
      */
-    public function validateProperty($object, string $propertyName, $groups = null)
+    public function validateProperty(object $object, string $propertyName, $groups = null)
     {
         return $this->validator->validateProperty($object, $propertyName, $groups);
     }
diff --git a/src/Symfony/Component/Validator/ValidatorBuilder.php b/src/Symfony/Component/Validator/ValidatorBuilder.php
index ce600242b5e76..ade30465a342f 100644
--- a/src/Symfony/Component/Validator/ValidatorBuilder.php
+++ b/src/Symfony/Component/Validator/ValidatorBuilder.php
@@ -115,7 +115,7 @@ public function addObjectInitializers(array $initializers)
      *
      * @return $this
      */
-    public function addXmlMapping($path)
+    public function addXmlMapping(string $path)
     {
         if (null !== $this->metadataFactory) {
             throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
@@ -151,7 +151,7 @@ public function addXmlMappings(array $paths)
      *
      * @return $this
      */
-    public function addYamlMapping($path)
+    public function addYamlMapping(string $path)
     {
         if (null !== $this->metadataFactory) {
             throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
@@ -185,7 +185,7 @@ public function addYamlMappings(array $paths)
      *
      * @return $this
      */
-    public function addMethodMapping($methodName)
+    public function addMethodMapping(string $methodName)
     {
         if (null !== $this->metadataFactory) {
             throw new ValidatorException('You cannot add custom mappings after setting a custom metadata factory. Configure your metadata factory instead.');
@@ -341,7 +341,7 @@ public function setTranslator(TranslatorInterface $translator)
      *
      * @return $this
      */
-    public function setTranslationDomain($translationDomain)
+    public function setTranslationDomain(?string $translationDomain)
     {
         $this->translationDomain = $translationDomain;
 
diff --git a/src/Symfony/Component/VarDumper/Caster/DOMCaster.php b/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
index 5644e489f3614..4dd16e0ee7461 100644
--- a/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/DOMCaster.php
@@ -82,7 +82,7 @@ public static function castLength($dom, array $a, Stub $stub, bool $isNested)
         return $a;
     }
 
-    public static function castImplementation($dom, array $a, Stub $stub, bool $isNested)
+    public static function castImplementation(\DOMImplementation $dom, array $a, Stub $stub, bool $isNested)
     {
         $a += [
             Caster::PREFIX_VIRTUAL.'Core' => '1.0',
diff --git a/src/Symfony/Component/VarDumper/Caster/RdKafkaCaster.php b/src/Symfony/Component/VarDumper/Caster/RdKafkaCaster.php
index c3e4eb9f341c6..db4bba8d38d40 100644
--- a/src/Symfony/Component/VarDumper/Caster/RdKafkaCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/RdKafkaCaster.php
@@ -31,7 +31,7 @@
  */
 class RdKafkaCaster
 {
-    public static function castKafkaConsumer(KafkaConsumer $c, array $a, Stub $stub, $isNested)
+    public static function castKafkaConsumer(KafkaConsumer $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -51,7 +51,7 @@ public static function castKafkaConsumer(KafkaConsumer $c, array $a, Stub $stub,
         return $a;
     }
 
-    public static function castTopic(Topic $c, array $a, Stub $stub, $isNested)
+    public static function castTopic(Topic $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -75,7 +75,7 @@ public static function castTopicPartition(TopicPartition $c, array $a)
         return $a;
     }
 
-    public static function castMessage(Message $c, array $a, Stub $stub, $isNested)
+    public static function castMessage(Message $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -86,7 +86,7 @@ public static function castMessage(Message $c, array $a, Stub $stub, $isNested)
         return $a;
     }
 
-    public static function castConf(Conf $c, array $a, Stub $stub, $isNested)
+    public static function castConf(Conf $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -97,7 +97,7 @@ public static function castConf(Conf $c, array $a, Stub $stub, $isNested)
         return $a;
     }
 
-    public static function castTopicConf(TopicConf $c, array $a, Stub $stub, $isNested)
+    public static function castTopicConf(TopicConf $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -108,7 +108,7 @@ public static function castTopicConf(TopicConf $c, array $a, Stub $stub, $isNest
         return $a;
     }
 
-    public static function castRdKafka(\RdKafka $c, array $a, Stub $stub, $isNested)
+    public static function castRdKafka(\RdKafka $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -121,14 +121,14 @@ public static function castRdKafka(\RdKafka $c, array $a, Stub $stub, $isNested)
         return $a;
     }
 
-    public static function castCollectionMetadata(CollectionMetadata $c, array $a, Stub $stub, $isNested)
+    public static function castCollectionMetadata(CollectionMetadata $c, array $a, Stub $stub, bool $isNested)
     {
         $a += iterator_to_array($c);
 
         return $a;
     }
 
-    public static function castTopicMetadata(TopicMetadata $c, array $a, Stub $stub, $isNested)
+    public static function castTopicMetadata(TopicMetadata $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -140,7 +140,7 @@ public static function castTopicMetadata(TopicMetadata $c, array $a, Stub $stub,
         return $a;
     }
 
-    public static function castPartitionMetadata(PartitionMetadata $c, array $a, Stub $stub, $isNested)
+    public static function castPartitionMetadata(PartitionMetadata $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
@@ -153,7 +153,7 @@ public static function castPartitionMetadata(PartitionMetadata $c, array $a, Stu
         return $a;
     }
 
-    public static function castBrokerMetadata(BrokerMetadata $c, array $a, Stub $stub, $isNested)
+    public static function castBrokerMetadata(BrokerMetadata $c, array $a, Stub $stub, bool $isNested)
     {
         $prefix = Caster::PREFIX_VIRTUAL;
 
diff --git a/src/Symfony/Component/VarDumper/Caster/ResourceCaster.php b/src/Symfony/Component/VarDumper/Caster/ResourceCaster.php
index 81b7b1a98a384..6ae908524f6c1 100644
--- a/src/Symfony/Component/VarDumper/Caster/ResourceCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ResourceCaster.php
@@ -60,7 +60,7 @@ public static function castStreamContext($stream, array $a, Stub $stub, bool $is
         return @stream_context_get_params($stream) ?: $a;
     }
 
-    public static function castGd($gd, array $a, Stub $stub, $isNested)
+    public static function castGd($gd, array $a, Stub $stub, bool $isNested)
     {
         $a['size'] = imagesx($gd).'x'.imagesy($gd);
         $a['trueColor'] = imageistruecolor($gd);
diff --git a/src/Symfony/Component/VarDumper/Caster/SplCaster.php b/src/Symfony/Component/VarDumper/Caster/SplCaster.php
index 11f1723d964a4..07f445116f660 100644
--- a/src/Symfony/Component/VarDumper/Caster/SplCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/SplCaster.php
@@ -39,7 +39,7 @@ public static function castArrayIterator(\ArrayIterator $c, array $a, Stub $stub
         return self::castSplArray($c, $a, $stub, $isNested);
     }
 
-    public static function castHeap(\Iterator $c, array $a, Stub $stub, $isNested)
+    public static function castHeap(\Iterator $c, array $a, Stub $stub, bool $isNested)
     {
         $a += [
             Caster::PREFIX_VIRTUAL.'heap' => iterator_to_array(clone $c),
diff --git a/src/Symfony/Component/VarDumper/Dumper/CliDumper.php b/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
index ab919e155850e..97cda3380981e 100644
--- a/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/CliDumper.php
@@ -324,7 +324,7 @@ public function leaveHash(Cursor $cursor, int $type, $class, bool $hasChild, int
      * @param bool $hasChild When the dump of the hash has child item
      * @param int  $cut      The number of items the hash has been cut by
      */
-    protected function dumpEllipsis(Cursor $cursor, $hasChild, $cut)
+    protected function dumpEllipsis(Cursor $cursor, bool $hasChild, int $cut)
     {
         if ($cut) {
             $this->line .= ' …';
@@ -428,7 +428,7 @@ protected function dumpKey(Cursor $cursor)
      *
      * @return string The value with style decoration
      */
-    protected function style($style, $value, $attr = [])
+    protected function style(string $style, string $value, array $attr = [])
     {
         if (null === $this->colors) {
             $this->colors = $this->supportsColors();
diff --git a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
index 45285189805bc..aebbcfbe657c7 100644
--- a/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
+++ b/src/Symfony/Component/VarDumper/Dumper/HtmlDumper.php
@@ -116,21 +116,16 @@ public function setDisplayOptions(array $displayOptions)
 
     /**
      * Sets an HTML header that will be dumped once in the output stream.
-     *
-     * @param string $header An HTML string
      */
-    public function setDumpHeader($header)
+    public function setDumpHeader(string $header)
     {
         $this->dumpHeader = $header;
     }
 
     /**
      * Sets an HTML prefix and suffix that will encapse every single dump.
-     *
-     * @param string $prefix The prepended HTML string
-     * @param string $suffix The appended HTML string
      */
-    public function setDumpBoundaries($prefix, $suffix)
+    public function setDumpBoundaries(string $prefix, string $suffix)
     {
         $this->dumpPrefix = $prefix;
         $this->dumpSuffix = $suffix;
@@ -851,7 +846,7 @@ public function leaveHash(Cursor $cursor, int $type, $class, bool $hasChild, int
     /**
      * {@inheritdoc}
      */
-    protected function style($style, $value, $attr = [])
+    protected function style(string $style, string $value, array $attr = [])
     {
         if ('' === $value) {
             return '';

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