Checking invisible skins

I want to block players from accessing my server if more than half of the pixels in their skin are transparent. Here is the code I’m using at the moment:

PHP:

public static function isInvisibleSkin(Skin $skin) : bool {
    $data = $skin->getSkinData();
    $length = strlen($data);
    $halfSkin = false;
    $totalSkin = $data === str_repeat("\x00", $length);
    $c = 0;
    for ($i = 0; $i < $length; $i++) {
        if ($c >= ($length / 2) + 3400) {
            $halfSkin = true;
            var_dump($length);
            var_dump($c); //DEBUG: I want to see if happens again.
            break;
        }
        if ($data[$i] === "\x00") {
            $c++;
        }
    }
return $halfSkin || $totalSkin;
}


It hasn’t exactly worked for some players - it’s even blocked some players because they have a second layer. How would I fix my code to achieve what I want?

 

First, Try to count what's the length of skin without layers to stop it from kicking Players with second layer.

 

R.I.P, Rip all my transperent skins i worked so hard to get

i cri everytime

 

Please read again your reply and correct your mistakes sir... Jk lol

 

i trying learn new language (php) when i cany use engis now i never make pmmp fork in scratch

i cri everytime