PHP base64_de code C＃相当于 [英] PHP base64_decode C# equivalent

问题描述

我试图模仿了一个PHP脚本，做到以下几点：

I'm trying to mimic a php script that do the following :

1. 替换GET vaiable与一个+号每一个空间（$ VAR = preg_replace（/ \\ s /，+，$ _ GET ['变种']）;）


2. 解码为Base64：base64_de code（$ VAR）;

1日我添加了一个方法执行一个base64解码：

1st i added a method perform a base64 decoding :

        public string base64Decode(string data)
    {
        try
        {
            System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();

            System.Text.Decoder utf8Decode = encoder.GetDecoder();

            byte[] todecode_byte = Convert.FromBase64String(data);
            int charCount = utf8Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
            char[] decoded_char = new char[charCount];
            utf8Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
            string result = new String(decoded_char);
            return result;
        }
        catch (Exception e)
        {
            throw new Exception("Error in base64Decode" + e.Message);
        }
    }

但接缝是UTF-8是不是做的工作，所以我尝试同样的方法，但用UTF-7

but it seams that UTF-8 is not doing the job , so i tried the same method but with a UTF-7

        public string base64Decode(string data)
    {
        try
        {
            System.Text.UTF7Encoding encoder = new System.Text.UTF7Encoding();

            System.Text.Decoder utf7Decode = encoder.GetDecoder();

            byte[] todecode_byte = Convert.FromBase64String(data);
            int charCount = utf7Decode.GetCharCount(todecode_byte, 0, todecode_byte.Length);
            char[] decoded_char = new char[charCount];
            utf7Decode.GetChars(todecode_byte, 0, todecode_byte.Length, decoded_char, 0);
            string result = new String(decoded_char);
            return result;
        }
        catch (Exception e)
        {
            throw new Exception("Error in base64Decode" + e.Message);
        }
    }

最后一件事要说，成功的PHP解码包含特殊标志，如注册标志和商标的迹象，但C＃版本不！

one last thing to say, the successful php decoding contains special signs , like the registered sign and trademark sign but the C# version doesn't !

此外，没有受服务器语言PHP base64_de code？

also , does php base64_decode affected by the server language ?

推荐答案

UTF-7是非常不可能是你想要的。你真的需要知道什么编码PHP使用。它的可能的是使用默认的编码系统。幸运的是它是一个更容易脱code比你让：

UTF-7 is very unlikely to be what you want. You really need to know what encoding PHP is using. It may be using the default encoding for your system. Fortunately it's a lot easier to decode than you're making it:

public static string base64Decode(string data)
{
    byte[] binary = Convert.FromBaseString(data);
    return Encoding.Default.GetString(binary);
}

有没有必要明确地与周围乱恩codeR ：）

There's no need to explicitly mess around with Encoder :)

另一种可能性是，PHP是使用ISO拉丁语1，这是code页28591：

Another possibility is that PHP is using ISO Latin 1, which is code page 28591:

public static string base64Decode(string data)
{
    byte[] binary = Convert.FromBaseString(data);
    return Encoding.GetEncoding(28591).GetString(binary);
}

PHP手册帮倒忙只是说：PHP 6之前，字符是一样的字节也就是说，恰好有256种可能的不同的角色。羞耻不说什么的每个字节实际上办法 ...

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