diff --git a/src/Symfony/Component/Cache/Traits/FilesystemCommonTrait.php b/src/Symfony/Component/Cache/Traits/FilesystemCommonTrait.php
index 5509e21028c98..fe61f08c16740 100644
--- a/src/Symfony/Component/Cache/Traits/FilesystemCommonTrait.php
+++ b/src/Symfony/Component/Cache/Traits/FilesystemCommonTrait.php
@@ -93,9 +93,20 @@ private function write(string $file, string $data, int $expiresAt = null)
set_error_handler(__CLASS__.'::throwError');
try {
if (null === $this->tmp) {
- $this->tmp = $this->directory.uniqid('', true);
+ $this->tmp = $this->directory.bin2hex(random_bytes(6));
}
- file_put_contents($this->tmp, $data);
+ try {
+ $h = fopen($this->tmp, 'x');
+ } catch (\ErrorException $e) {
+ if (false === strpos($e->getMessage(), 'File exists')) {
+ throw $e;
+ }
+
+ $this->tmp = $this->directory.bin2hex(random_bytes(6));
+ $h = fopen($this->tmp, 'x');
+ }
+ fwrite($h, $data);
+ fclose($h);
if (null !== $expiresAt) {
touch($this->tmp, $expiresAt);
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