php中用memcached实现页面防刷新功能

function requestCount(){ 

 $patharr = pathinfo($_SERVER['PHP_SELF']);

 $filename = explode('?',$patharr['basename']);//获取当前文件名

 if( in_array($filename['0'],array('index.php','login.php','password.php')) ){

 global $memcache;

 $clientip = get_client_ip();

 //使用长整型IP和文件名生成KEY

 $ipkey = 'C'.sprintf("%u", ip2long( $clientip )). $filename['0'] ;

 if( $visitCount = $memcache->get($ipkey) ){  

      if($visitCount == 100){

        die('<h1>Please don\'t refresh your page!</h1>');

      }else{

        $memcache->increment($ipkey);

      }  

 }else{

    $memcache->set($ipkey,1,0,60);

 }

 }

}