vendor/symfony/cache/Traits/FilesystemTrait.php line 57
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\Cache\Traits;use Symfony\Component\Cache\Exception\CacheException;use Symfony\Component\Cache\Marshaller\MarshallerInterface;/*** @author Nicolas Grekas <p@tchwork.com>* @author Rob Frawley 2nd <rmf@src.run>** @internal*/trait FilesystemTrait{use FilesystemCommonTrait;private MarshallerInterface $marshaller;public function prune(): bool{$time = time();$pruned = true;foreach ($this->scanHashDir($this->directory) as $file) {if (!$h = @fopen($file, 'r')) {continue;}if (($expiresAt = (int) fgets($h)) && $time >= $expiresAt) {fclose($h);$pruned = (@unlink($file) || !file_exists($file)) && $pruned;} else {fclose($h);}}return $pruned;}protected function doFetch(array $ids): iterable{$values = [];$now = time();foreach ($ids as $id) {$file = $this->getFile($id);if (!is_file($file) || !$h = @fopen($file, 'r')) {continue;}if (($expiresAt = (int) fgets($h)) && $now >= $expiresAt) {fclose($h);@unlink($file);} else {$i = rawurldecode(rtrim(fgets($h)));$value = stream_get_contents($h);fclose($h);if ($i === $id) {$values[$id] = $this->marshaller->unmarshall($value);}}}return $values;}protected function doHave(string $id): bool{$file = $this->getFile($id);return is_file($file) && (@filemtime($file) > time() || $this->doFetch([$id]));}protected function doSave(array $values, int $lifetime): array|bool{$expiresAt = $lifetime ? (time() + $lifetime) : 0;$values = $this->marshaller->marshall($values, $failed);foreach ($values as $id => $value) {if (!$this->write($this->getFile($id, true), $expiresAt."\n".rawurlencode($id)."\n".$value, $expiresAt)) {$failed[] = $id;}}if ($failed && !is_writable($this->directory)) {throw new CacheException(sprintf('Cache directory is not writable (%s).', $this->directory));}return $failed;}private function getFileKey(string $file): string{if (!$h = @fopen($file, 'r')) {return '';}fgets($h); // expiry$encodedKey = fgets($h);fclose($h);return rawurldecode(rtrim($encodedKey));}}