获取客户端真是IP地址

      function get_client_ip($type = 0,$client=true)
          {
             $type       =  $type ? 1 : 0;
             static $ip  =   NULL;
             if ($ip !== NULL) return $ip[$type];
             if($client){
                 if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
                     $arr    =   explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
                     $pos    =   array_search('unknown',$arr);
                     if(false !== $pos) unset($arr[$pos]);
                     $ip     =   trim($arr[0]);
                  }elseif (isset($_SERVER['HTTP_CLIENT_IP'])) {
                     $ip     =   $_SERVER['HTTP_CLIENT_IP'];
                  }elseif (isset($_SERVER['REMOTE_ADDR'])) {
                     $ip     =   $_SERVER['REMOTE_ADDR'];
                  }
              }elseif (isset($_SERVER['REMOTE_ADDR'])) {
                 $ip     =   $_SERVER['REMOTE_ADDR'];
              }
             // 防止IP伪造
             $long = sprintf("%u",ip2long($ip));
             $ip   = $long ? array($ip, $long) : array('0.0.0.0', 0);
             return $ip[$type];
          }
  
 

文章来源: blog.csdn.net，作者：咔咔-，版权归原作者所有，如需转载，请联系作者。

原文链接：blog.csdn.net/fangkang7/article/details/82757779