如何在PHP中将字节数组转换为字符串

Question

我有一个WebSocket编码器：

print_r(frameEncode("How can I convert a byteArray to String in PHP?"));
    function frameEncode($message) {
        $messageBytes = array();
        $messageLength = strlen($message);
        $messageBytes[0] = 129;
        if ($messageLength < 126) {
            $messageBytes[1] = $messageLength;
        } else if ($messageLength <= 65535) {
            $messageBytes[1] = 126;
            $messageBytes[2] = ($messageLength >> 8) & 255;
            $messageBytes[3] = $messageLength & 255;
        } else {
            $messageBytes[1] = 127;
            $messageBytes[2] = ($messageLength >> 56) & 255;
            $messageBytes[3] = ($messageLength >> 48) & 255;
            $messageBytes[4] = ($messageLength >> 40) & 255;
            $messageBytes[5] = ($messageLength >> 32) & 255;
            $messageBytes[6] = ($messageLength >> 24) & 255;
            $messageBytes[7] = ($messageLength >> 16) & 255;
            $messageBytes[8] = ($messageLength >> 8) & 255;
            $messageBytes[9] = $messageLength & 255;
        }
        return pack("C*", $messageBytes) . $message;
    }

如何在函数末尾将$messageBytes转换为字符串？数组值只是被pack()忽略了。

Answer 1

您可以像这样使用call_user_func_array：

call_user_func_array('pack', array_merge(array('C*'), $messageBytes)))

Answer 2

return pack("C*", implode(' ', $messageBytes)) . $message;