查询qq登陆状态

 function qq_status(){
    if (empty($qq))$qq = 287959133;
    $url = 'http://wpa.qq.com/pa?p=2:'.$qq.':52';
    $Headers = get_headers($url, 1);
    if ($Headers['Location']=='http://pub.idqqimg.com/qconn/wpa/button/button_121.gif'){
        $Status = 1;  //QQ在线
    }elseif ($Headers['Location']=='http://pub.idqqimg.com/qconn/wpa/button/button_120.gif'){
        $Status = 2;  //QQ离线
    }else {
        $Status = 0;  //未知
    }

    Return $Status;

 }

 $qqwp = qq_status('287959133');  //测试QQ是否在线,返回1=在线,返回2=离线,返回0=错误
 if ($qqwp==1){
    echo 'QQ在线';
 }elseif ($qqwp==2){
    echo 'QQ离线';
 }else {
    echo '出错了';
 }