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<?php |
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/** |
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* |
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* This file is part of phpFastCache. |
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* |
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* @license MIT License (MIT) |
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* |
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* For full copyright and license information, please see the docs/CREDITS.txt file. |
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* |
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* @author Lucas Brucksch <[email protected]> |
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* |
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*/ |
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namespace phpFastCache\Drivers\Zendshm; |
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use phpFastCache\Core\DriverAbstract; |
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use phpFastCache\Core\StandardPsr6StructureTrait; |
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use phpFastCache\Entities\driverStatistic; |
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use phpFastCache\Exceptions\phpFastCacheDriverCheckException; |
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use phpFastCache\Exceptions\phpFastCacheDriverException; |
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use Psr\Cache\CacheItemInterface; |
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/** |
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* Class Driver (zend memory cache) |
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* Requires Zend Data Cache Functions from ZendServer |
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* @package phpFastCache\Drivers |
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*/ |
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class Driver extends DriverAbstract |
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{ |
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/** |
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* Driver constructor. |
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* @param array $config |
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* @throws phpFastCacheDriverException |
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*/ |
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public function __construct(array $config = []) |
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{ |
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$this->setup($config); |
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if (!$this->driverCheck()) { |
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throw new phpFastCacheDriverCheckException(sprintf(self::DRIVER_CHECK_FAILURE, $this->getDriverName())); |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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public function driverCheck() |
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{ |
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if (extension_loaded('Zend Data Cache') && function_exists('zend_shm_cache_store')) { |
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return true; |
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} else { |
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return false; |
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} |
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} |
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/** |
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* @param \Psr\Cache\CacheItemInterface $item |
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* @return mixed |
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* @throws \InvalidArgumentException |
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*/ |
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protected function driverWrite(CacheItemInterface $item) |
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{ |
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/** |
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* Check for Cross-Driver type confusion |
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*/ |
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if ($item instanceof Item) { |
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$ttl = $item->getExpirationDate()->getTimestamp() - time(); |
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return zend_shm_cache_store($item->getKey(), $this->driverPreWrap($item), ($ttl > 0 ? $ttl : 0)); |
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} else { |
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throw new \InvalidArgumentException('Cross-Driver type confusion detected'); |
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} |
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} |
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/** |
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* @param \Psr\Cache\CacheItemInterface $item |
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* @return mixed |
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*/ |
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protected function driverRead(CacheItemInterface $item) |
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{ |
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$data = zend_shm_cache_fetch($item->getKey()); |
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if ($data === false) { |
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return null; |
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} |
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return $data; |
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} |
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/** |
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* @param \Psr\Cache\CacheItemInterface $item |
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* @return bool |
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* @throws \InvalidArgumentException |
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*/ |
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protected function driverDelete(CacheItemInterface $item) |
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{ |
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/** |
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* Check for Cross-Driver type confusion |
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*/ |
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if ($item instanceof Item) { |
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return zend_shm_cache_delete($item->getKey()); |
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} else { |
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throw new \InvalidArgumentException('Cross-Driver type confusion detected'); |
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} |
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} |
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/** |
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* @return bool |
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*/ |
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protected function driverClear() |
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{ |
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return @zend_shm_cache_clear(); |
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} |
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/** |
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* @return bool |
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*/ |
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protected function driverConnect() |
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{ |
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return true; |
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} |
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/******************** |
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* |
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* PSR-6 Extended Methods |
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* |
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*******************/ |
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/** |
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* @return driverStatistic |
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*/ |
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public function getStats() |
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{ |
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if(function_exists('zend_shm_cache_info')) { |
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$stats = (array)zend_shm_cache_info(); |
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return (new driverStatistic()) |
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->setData(implode(', ', array_keys($this->namespaces))) |
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->setInfo(sprintf("The Zend memory have %d item(s) in cache.\n For more information see RawData.", $stats['items_total'])) |
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->setRawData($stats) |
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->setSize($stats['memory_total']); |
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} else { |
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/** zend_shm_cache_info supported V8 or higher */ |
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return (new driverStatistic()) |
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->setData(implode(', ', array_keys($this->namespaces))) |
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->setInfo("The Zend memory statistics is only supported by ZendServer V8 or higher") |
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->setRawData(null) |
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->setSize(0); |
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} |
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} |
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} |
PHPSocialNetwork /
phpfastcache
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: