强大的PHP缓存种(eaccelerator、apc、xcache、memcache模块缓存)

强大的PHP缓存类(eaccelerator、apc、xcache、memcache模块缓存)

cache_expire=$exp_time;        $this->cache_params=$params;        $this->setCacheType($type);    }         public function __destruct() {        unset($this->cache_external);    }         // Prevent users to clone the instance    public function __clone(){        $this->cacheError('Clone is not allowed.');    }         //deletes cache from folder    public function clearCache(){        switch($this->cache_type){            case 'eaccelerator':                @eaccelerator_clean();                @eaccelerator_clear();            break;             case 'apc':                apc_clear_cache('user');            break;             case 'xcache':                xcache_clear_cache(XC_TYPE_VAR, 0);            break;             case 'memcache':                @$this->cache_external->flush();            break;                         case 'filecache':                $this->cache_external->deleteCache();            break;        }      }         //writes or reads the cache    public function cache($key, $value='',$ttl=''){        if ($value!=''){//wants to write            if ($ttl=='') $ttl=$this->cache_expire;            $this->put($key, $value,$ttl);        }        else return $this->get($key);//reading value    }         //creates new cache files with the given data, $key== name of the cache, data the info/values to store    private function put($key,$data,$ttl='' ){        if ($ttl=='') $ttl=$this->cache_expire;                 switch($this->cache_type){            case 'eaccelerator':                eaccelerator_put($key, serialize($data), $ttl);            break;             case 'apc':                apc_store($key, $data, $ttl);            break;             case 'xcache':                xcache_set($key, serialize($data), $ttl);            break;             case 'memcache':                $data=serialize($data);                if (!$this->cache_external->replace($key, $data, false, $ttl))                $this->cache_external->set($key, $data, false, $ttl);            break;                         case 'filecache':                $this->cache_external->cache($key,$data);            break;        }      }         //returns cache for the given key    private function get($key){        switch($this->cache_type){            case 'eaccelerator':                $data =  @unserialize(eaccelerator_get($key));            break;             case 'apc':                $data =  apc_fetch($key);            break;             case 'xcache':                $data =  @unserialize(xcache_get($key));            break;             case 'memcache':                $data = @unserialize($this->cache_external->get($key));            break;                         case 'filecache':                $data = $this->cache_external->cache($key);            break;        }          /*echo '
--returnning data for key:'.$key;        var_dump($data);*/        return $data;    }         //delete key from cache    public function delete($key){        switch($this->cache_type){            case 'eaccelerator':                eaccelerator_rm($key);            break;             case 'apc':                apc_delete($key);            break;             case 'xcache':                xcache_unset($key);            break;             case 'memcache':                $this->cache_external->delete($key);            break;                         case 'filecache':                $this->cache_external->delete($key);            break;        }           }    // Overloading for the Application variables and automatically cached        public function __set($name, $value) {            $this->put($name, $value, $this->cache_expire);        }             public function __get($name) {            return $this->get($name);        }             public function __isset($key) {//echo "Is '$name' set?\n"            if ($this->get($key) !== false)  return true;            else return false;        }             public function __unset($name) {//echo "Unsetting '$name'\n";            $this->delete($name);        }    //end overloads         public function getCacheType(){        return $this->$this->cache_type;    }           //sets the cache if its installed if not triggers error    public function setCacheType($type){        $this->cache_type=strtolower($type);                 switch($this->cache_type){            case 'eaccelerator':                if (function_exists('eaccelerator_get')) $this->cache_type = 'eaccelerator';                else $this->cacheError('eaccelerator not found');               break;             case 'apc':                if (function_exists('apc_fetch')) $this->cache_type = 'apc' ;                else $this->cacheError('APC not found');             break;             case 'xcache':                if (function_exists('xcache_get')) $this->cache_type = 'xcache' ;                else $this->cacheError('Xcache not found');            break;             case 'memcache':                if (class_exists('Memcache')) $this->init_memcache();                else $this->cacheError('memcache not found');            break;                         case 'filecache':                if (class_exists('fileCache'))$this->init_filecache();                else $this->cacheError('fileCache not found');            break;                         case 'auto'://try to auto select a cache system                if (function_exists('eaccelerator_get'))    $this->cache_type = 'eaccelerator';                                                      elseif (function_exists('apc_fetch'))       $this->cache_type = 'apc' ;                                                    elseif (function_exists('xcache_get'))      $this->cache_type = 'xcache' ;                                                       elseif (class_exists('Memcache'))           $this->init_memcache();                elseif (class_exists('fileCache'))          $this->init_filecache();                else $this->cacheError('not any compatible cache was found');            break;                         default://not any cache selected or wrong one selected                if (isset($type)) $msg='Unrecognized cache type selected '.$type.'';                else $msg='Not any cache type selected';                $this->cacheError($msg);                break;        }    }               private function init_memcache(){//get instance of the memcache class        if (is_array($this->cache_params)){            $this->cache_type = 'memcache';            $this->cache_external = new Memcache;            foreach ($this->cache_params as $server) {                $server['port'] = isset($server['port']) ? (int) $server['port'] : ini_get('memcache.default_port');                $server['persistent'] = isset($server['persistent']) ? (bool) $server['persistent'] : true;                $this->cache_external->addServer($server['host'], $server['port'], $server['persistent']);            }        }        else $this->cacheError('memcache needs an array, example:                    wrapperCache::GetInstance(\'memcache\',30,array(array(\'host\'=>\'localhost\')));');    }         private function init_filecache(){//get instance of the filecache class        $this->cache_type = 'filecache';        $this->cache_external = fileCache::GetInstance($this->cache_expire,$this->cache_params);    }         public function getAvailableCache($return_format='html'){//returns the available cache        $avCaches   = array();        $avCaches[] = array('eaccelerator',function_exists('eaccelerator_get'));                                              $avCaches[] = array('apc',function_exists('apc_fetch')) ;                                            $avCaches[] = array('xcache',function_exists('xcache_get'));                                               $avCaches[] = array('memcache',class_exists('Memcache'));        $avCaches[] = array('fileCache',class_exists('fileCache'));                 if ($return_format=='html'){            $ret='

'; foreach ($avCaches as $c){ $ret.='
• '.$c[0].' - '; if ($c[1]) $ret.='Found/Compatible'; else $ret.='Not Found/Incompatible'; $ret.=''; } return $ret.'

'; } else return $avCaches; } private function cacheError($msg){//triggers error trigger_error('
wrapperCache error: '.$msg. '
If you want you can try with \'auto\' for auto select a compatible cache.
Or choose a supported cache from list:'.$this->getAvailableCache(), E_USER_ERROR); }}?>

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