pocketmine\utils\Binary::readTriad PHP Method

    public static function readTriad($str)
    {
        return unpack("N", "" . $str)[1];
    }

 public function readTriad($signed = true)
 {
     $triad = Binary::readTriad($this->read(3));
     if (!$signed and $triad < 0) {
         $triad += 0x1000000;
     }
     return $triad;
 }