php memcache类

<?php
/*
* 2012-12-04 14:54
* @author 孤独求学人
*/
class php_memcache{
protected $handle  = null;
protected $mem  = null;
private $host   = "";
private $port   = "";
private $timeout  = 0;
private $pconnect = false;
public function __construct($host = '127.0.0.1',$port='11211',$timeout=0,$pconnect=false){
  $this->host = $host;
  $this->port = $port;
  $this->timeout = $timeout;
  $this->pconnect = $pconnect;
  $this->mem     = new Memcache();
}
public function connect(){
  if(!is_resource($this->handle)) {
   if($this->pconnect == false){
    if(empty($this->host)){
     return false;
    }
    if(empty($this->port)){
     return false;
    }
    $handle = $this->mem->connect($this->host,$this->port);
    if(!$handle){
     return false;
    }else{
     $this->handle = $handle;
    }
   }
  }
  return $this->handle;
}
public function set($key,$val,$flag=false,$expire=0){
  if(!$this->connect()) return false;
  $iFlage = 0;
  if($flag == true){
   $iFlage = MEMCACHE_COMPRESSED;
  }
  return $this->mem->set($key,$val,$iFlage,$expire);
}
public function get($key){
  if(!$this->connect()) return false;
  if (is_array($key)) {
             $dest = array();
             foreach ($key as $subkey) {
              $val = $this->get($subkey);
              if (!($val === false)){
               $dest[$subkey] = $val;
              }
             }
             return $dest;
         } else {
             return $this->mem->get($key);
         }
}
public function replace($key,$val,$flag=false,$expire=0){
  if(!$this->connect()) return false;
     $iFlage = 0;
  if($flag == true){
   $iFlage = MEMCACHE_COMPRESSED;
  }
  return $this->mem->replace($key,$val,$iFlage,$expire);
}
public function delete($key,$time=0){
  if(!$this->connect()) return false;
  return $this->mem->delete($key,$time);
}
public function flush(){
  if(!$this->connect()) return false;
  return $this->mem->flush();
}
public function incr($key,$val=1){
  if(!$this->connect()) return false;
  return $this->mem->increment($key,$val);
}
    public function decr($key,$val=1){
  if(!$this->connect()) return false;
  return $this->mem->decrement($key,$val);
}
public function getVersion(){
  if(!$this->connect()) return false;
  return $this->mem->getVersion();
}
}
?>