Devristo\Phpws\Framing\WebSocketFrame::encode PHP Method

    public function encode()
    {
        $this->payloadLength = strlen($this->payloadData);
        $firstByte = $this->opcode;
        $firstByte += $this->FIN * 128 + $this->RSV1 * 64 + $this->RSV2 * 32 + $this->RSV3 * 16;
        $encoded = chr($firstByte);
        if ($this->payloadLength <= 125) {
            $secondByte = $this->payloadLength;
            $secondByte += $this->mask * 128;
            $encoded .= chr($secondByte);
        } else {
            if ($this->payloadLength <= 256 * 256 - 1) {
                $secondByte = 126;
                $secondByte += $this->mask * 128;
                $encoded .= chr($secondByte) . pack("n", $this->payloadLength);
            } else {
                // TODO: max length is now 32 bits instead of 64 !!!!!
                $secondByte = 127;
                $secondByte += $this->mask * 128;
                $encoded .= chr($secondByte);
                $encoded .= pack("N", 0);
                $encoded .= pack("N", $this->payloadLength);
            }
        }
        $key = 0;
        if ($this->mask) {
            $key = pack("N", rand(0, PHP_INT_MAX));
            $encoded .= $key;
        }
        if ($this->payloadData) {
            $encoded .= $this->mask == 1 ? $this->rotMask($this->payloadData, $key) : $this->payloadData;
        }
        return $encoded;
    }