102 lines
2.4 KiB
PHP
102 lines
2.4 KiB
PHP
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<?php
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/**
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* Memcache CacheResource
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* CacheResource Implementation based on the KeyValueStore API to use
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* memcache as the storage resource for Smarty's output caching.
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* Note that memcache has a limitation of 256 characters per cache-key.
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* To avoid complications all cache-keys are translated to a sha1 hash.
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*
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* @package CacheResource-examples
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* @author Rodney Rehm
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*/
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class Smarty_CacheResource_Memcache extends Smarty_CacheResource_KeyValueStore
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{
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/**
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* memcache instance
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*
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* @var Memcache
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*/
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protected $memcache = null;
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public function __construct()
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{
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if (class_exists('Memcached')) {
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$this->memcache = new Memcached();
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} else {
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$this->memcache = new Memcache();
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}
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$this->memcache->addServer('127.0.0.1', 11211);
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}
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/**
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* Read values for a set of keys from cache
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*
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* @param array $keys list of keys to fetch
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*
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* @return array list of values with the given keys used as indexes
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* @return boolean true on success, false on failure
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*/
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protected function read(array $keys)
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{
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$_keys = $lookup = array();
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foreach ($keys as $k) {
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$_k = sha1($k);
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$_keys[] = $_k;
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$lookup[ $_k ] = $k;
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}
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$_res = array();
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$res = $this->memcache->get($_keys);
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foreach ($res as $k => $v) {
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$_res[ $lookup[ $k ] ] = $v;
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}
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return $_res;
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}
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/**
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* Save values for a set of keys to cache
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*
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* @param array $keys list of values to save
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* @param int $expire expiration time
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*
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* @return boolean true on success, false on failure
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*/
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protected function write(array $keys, $expire = null)
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{
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foreach ($keys as $k => $v) {
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$k = sha1($k);
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$this->memcache->set($k, $v, 0, $expire);
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}
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return true;
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}
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/**
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* Remove values from cache
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*
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* @param array $keys list of keys to delete
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*
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* @return boolean true on success, false on failure
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*/
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protected function delete(array $keys)
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{
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foreach ($keys as $k) {
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$k = sha1($k);
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$this->memcache->delete($k);
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}
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return true;
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}
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/**
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* Remove *all* values from cache
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*
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* @return boolean true on success, false on failure
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*/
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protected function purge()
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{
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$this->memcache->flush();
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}
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}
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