php memcached数据缓存入门例子

class mycache
{
  private $cache;
  function  __construct()
  {
    $this->cache = new memcache();
    // you can replace localhost by memcached server ip addr and port no.
    $this->cache->connect('localhost', 10987);
  } // bbs.it-home.org

  function get_data($key)
  {
    $data = $this->cache->get($key);
    if($data != null)
      return $data;
    else
    {
      if($this->cache->getresultcode() == memcached::res_notfound)
      {
        //do the databse query here and fetch data
        $this->cache->set($key,$data_returned_from_database);
      }
      else
      {
        error_log('no data for key '.$key);
      }
    }
  }
}
$cache = mycache();
$cache->get_data('foo');
?>