vendor/symfony/config/ResourceCheckerConfigCache.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\Config;use Symfony\Component\Config\Resource\ResourceInterface;use Symfony\Component\Filesystem\Exception\IOException;use Symfony\Component\Filesystem\Filesystem;/*** ResourceCheckerConfigCache uses instances of ResourceCheckerInterface* to check whether cached data is still fresh.** @author Matthias Pigulla <mp@webfactory.de>*/class ResourceCheckerConfigCache implements ConfigCacheInterface{private string $file;/*** @var iterable<mixed, ResourceCheckerInterface>*/private iterable $resourceCheckers;/*** @param string $file The absolute cache path* @param iterable<mixed, ResourceCheckerInterface> $resourceCheckers The ResourceCheckers to use for the freshness check*/public function __construct(string $file, iterable $resourceCheckers = []){$this->file = $file;$this->resourceCheckers = $resourceCheckers;}public function getPath(): string{return $this->file;}/*** Checks if the cache is still fresh.** This implementation will make a decision solely based on the ResourceCheckers* passed in the constructor.** The first ResourceChecker that supports a given resource is considered authoritative.* Resources with no matching ResourceChecker will silently be ignored and considered fresh.*/public function isFresh(): bool{if (!is_file($this->file)) {return false;}if ($this->resourceCheckers instanceof \Traversable && !$this->resourceCheckers instanceof \Countable) {$this->resourceCheckers = iterator_to_array($this->resourceCheckers);}if (!\count($this->resourceCheckers)) {return true; // shortcut - if we don't have any checkers we don't need to bother with the meta file at all}$metadata = $this->getMetaFile();if (!is_file($metadata)) {return false;}$meta = $this->safelyUnserialize($metadata);if (false === $meta) {return false;}$time = filemtime($this->file);foreach ($meta as $resource) {foreach ($this->resourceCheckers as $checker) {if (!$checker->supports($resource)) {continue; // next checker}if ($checker->isFresh($resource, $time)) {break; // no need to further check this resource}return false; // cache is stale}// no suitable checker found, ignore this resource}return true;}/*** Writes cache.** @param string $content The content to write in the cache* @param ResourceInterface[] $metadata An array of metadata** @throws \RuntimeException When cache file can't be written*/public function write(string $content, array $metadata = null){$mode = 0666;$umask = umask();$filesystem = new Filesystem();$filesystem->dumpFile($this->file, $content);try {$filesystem->chmod($this->file, $mode, $umask);} catch (IOException) {// discard chmod failure (some filesystem may not support it)}if (null !== $metadata) {$filesystem->dumpFile($this->getMetaFile(), serialize($metadata));try {$filesystem->chmod($this->getMetaFile(), $mode, $umask);} catch (IOException) {// discard chmod failure (some filesystem may not support it)}}if (\function_exists('opcache_invalidate') && filter_var(\ini_get('opcache.enable'), \FILTER_VALIDATE_BOOL)) {@opcache_invalidate($this->file, true);}}/*** Gets the meta file path.*/private function getMetaFile(): string{return $this->file.'.meta';}private function safelyUnserialize(string $file){$meta = false;$content = file_get_contents($file);$signalingException = new \UnexpectedValueException();$prevUnserializeHandler = ini_set('unserialize_callback_func', self::class.'::handleUnserializeCallback');$prevErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = []) use (&$prevErrorHandler, $signalingException) {if (__FILE__ === $file) {throw $signalingException;}return $prevErrorHandler ? $prevErrorHandler($type, $msg, $file, $line, $context) : false;});try {$meta = unserialize($content);} catch (\Throwable $e) {if ($e !== $signalingException) {throw $e;}} finally {restore_error_handler();ini_set('unserialize_callback_func', $prevUnserializeHandler);}return $meta;}/*** @internal*/public static function handleUnserializeCallback(string $class){trigger_error('Class not found: '.$class);}}