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<?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 Psr\Log\LoggerAwareTrait; use Symfony\Component\Cache\CacheItem; /** * @author Nicolas Grekas <p@tchwork.com> * * @internal */ trait ArrayTrait { use LoggerAwareTrait; private $storeSerialized; private $values = []; private $expiries = []; /** * Returns all cached values, with cache miss as null. * * @return array */ public function getValues() { if (!$this->storeSerialized) { return $this->values; } $values = $this->values; foreach ($values as $k => $v) { if (null === $v || 'N;' === $v) { continue; } if (!\is_string($v) || !isset($v[2]) || ':' !== $v[1]) { $values[$k] = serialize($v); } } return $values; } /** * {@inheritdoc} */ public function hasItem($key) { if (\is_string($key) && isset($this->expiries[$key]) && $this->expiries[$key] > microtime(true)) { return true; } CacheItem::validateKey($key); return isset($this->expiries[$key]) && !$this->deleteItem($key); } /** * {@inheritdoc} */ public function clear() { $this->values = $this->expiries = []; return true; } /** * {@inheritdoc} */ public function deleteItem($key) { if (!\is_string($key) || !isset($this->expiries[$key])) { CacheItem::validateKey($key); } unset($this->values[$key], $this->expiries[$key]); return true; } /** * {@inheritdoc} */ public function reset() { $this->clear(); } private function generateItems(array $keys, $now, $f) { foreach ($keys as $i => $key) { if (!$isHit = isset($this->expiries[$key]) && ($this->expiries[$key] > $now || !$this->deleteItem($key))) { $this->values[$key] = $value = null; } else { $value = $this->storeSerialized ? $this->unfreeze($key, $isHit) : $this->values[$key]; } unset($keys[$i]); yield $key => $f($key, $value, $isHit); } foreach ($keys as $key) { yield $key => $f($key, null, false); } } private function freeze($value, $key) { if (null === $value) { return 'N;'; } if (\is_string($value)) { // Serialize strings if they could be confused with serialized objects or arrays if ('N;' === $value || (isset($value[2]) && ':' === $value[1])) { return serialize($value); } } elseif (!is_scalar($value)) { try { $serialized = serialize($value); } catch (\Exception $e) { $type = \is_object($value) ? \get_class($value) : \gettype($value); $message = sprintf('Failed to save key "{key}" of type %s: %s', $type, $e->getMessage()); CacheItem::log($this->logger, $message, ['key' => $key, 'exception' => $e]); return null; } // Keep value serialized if it contains any objects or any internal references if ('C' === $serialized[0] || 'O' === $serialized[0] || preg_match('/;[OCRr]:[1-9]/', $serialized)) { return $serialized; } } return $value; } private function unfreeze(string $key, bool &$isHit) { if ('N;' === $value = $this->values[$key]) { return null; } if (\is_string($value) && isset($value[2]) && ':' === $value[1]) { try { $value = unserialize($value); } catch (\Exception $e) { CacheItem::log($this->logger, 'Failed to unserialize key "{key}": '.$e->getMessage(), ['key' => $key, 'exception' => $e]); $value = false; } if (false === $value) { $this->values[$key] = $value = null; $isHit = false; } } return $value; } }
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