灵感来源七合一签到被黑防止被网暴

function getQQAvatar($qqNum) {
$str = @file_get_contents("

$qqNum");
$start = strpos($str, '&k=') + 3;
$end = strpos($str, '&s=');
$k = substr($str, $start , $end - $start);
return ''.$k.'&s=100';
}

k值获取
QQ