pocketmine\utils\Binary::readLFloat PHP Method

    public static function readLFloat($str)
    {
        return ENDIANNESS === self::BIG_ENDIAN ? unpack("f", strrev($str))[1] : unpack("f", $str)[1];
    }

 public function getLFloat()
 {
     return Binary::readLFloat($this->get(4));
 }