pocketmine\utils\BinaryStream::get PHP Method

    public function get($len)
    {
        if ($len < 0) {
            $this->offset = strlen($this->buffer) - 1;
            return "";
        } elseif ($len === true) {
            return substr($this->buffer, $this->offset);
        }
        return $len === 1 ? $this->buffer[$this->offset++] : substr($this->buffer, ($this->offset += $len) - $len, $len);
    }