获取服客户端ip

/**

 * 获取客户端IP地址

 *@paraminteger $type 返回类型 0 返回IP地址 1 返回IPV4地址数字

 *@returnmixed

 */

functionget_client_ip($type = 0) {

    $type       =  $type ? 1 : 0;

   static$ip  =  NULL;

   if($ip !==NULL)return$ip[$type];

   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'];

    }

   // IP地址合法验证

    $long = sprintf("%u",ip2long($ip));

    $ip   = $long ?array($ip, $long) :array('0.0.0.0', 0);

   return$ip[$type];

}