diff --git a/src/Symfony/Component/Filesystem/Filesystem.php b/src/Symfony/Component/Filesystem/Filesystem.php
index 5c9bbd12b7107..fd1dbf39b2e06 100644
--- a/src/Symfony/Component/Filesystem/Filesystem.php
+++ b/src/Symfony/Component/Filesystem/Filesystem.php
@@ -318,6 +318,8 @@ private function isReadable(string $filename): bool
*/
public function symlink($originDir, $targetDir, $copyOnWindows = false)
{
+ self::assertFunctionExists('symlink');
+
if ('\\' === \DIRECTORY_SEPARATOR) {
$originDir = strtr($originDir, '/', '\\');
$targetDir = strtr($targetDir, '/', '\\');
@@ -354,6 +356,8 @@ public function symlink($originDir, $targetDir, $copyOnWindows = false)
*/
public function hardlink($originFile, $targetFiles)
{
+ self::assertFunctionExists('link');
+
if (!$this->exists($originFile)) {
throw new FileNotFoundException(null, 0, null, $originFile);
}
@@ -737,13 +741,22 @@ private function getSchemeAndHierarchy(string $filename): array
return 2 === \count($components) ? [$components[0], $components[1]] : [null, $components[0]];
}
+ private static function assertFunctionExists(string $func): void
+ {
+ if (!\function_exists($func)) {
+ throw new IOException(sprintf('Unable to perform filesystem operation because the "%s()" function has been disabled.', $func));
+ }
+ }
+
/**
* @param mixed ...$args
*
* @return mixed
*/
- private static function box(callable $func, ...$args)
+ private static function box(string $func, ...$args)
{
+ self::assertFunctionExists($func);
+
self::$lastError = null;
set_error_handler(__CLASS__.'::handleError');
try {
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