制定RSS提要的字符编码似乎很复杂。即使是普通的网页也经常忽略或谎报它们的编码。

因此，您可以尝试使用正确的方法来检测编码，然后退回到某种形式的自动检测(猜测)。

整理完PHP脚本后，不要忘记告诉MySQL你要传递的字符集和你想要接收的字符集。

例如:设置为UTF-8

在Latin 1 I/O会话中将UTF-8数据传递给Latin 1表会导致这些讨厌的鸟脚。我每隔一天就会在OsCommerce商店看到这个。后面和第四个似乎是对的。但是phpMyAdmin会显示真相。通过告诉MySQL你正在传递什么字符集，它将为你处理MySQL数据的转换。

如何恢复现有的乱码MySQL数据是另一个问题。：）

检测编码是困难的。

mb_detect_encoding works by guessing, based on a number of candidates that you pass it. In some encodings, certain byte-sequences are invalid, an therefore it can distinguish between various candidates. Unfortunately, there are a lot of encodings, where the same bytes are valid (but different). In these cases, there is no way to determine the encoding; You can implement your own logic to make guesses in these cases. For example, data coming from a Japanese site might be more likely to have a Japanese encoding.

As long as you only deal with Western European languages, the three major encodings to consider are utf-8, iso-8859-1 and cp-1252. Since these are defaults for many platforms, they are also the most likely to be reported wrongly about. Eg. if people use different encodings, they are likely to be frank about it, since else their software would break very often. Therefore, a good strategy is to trust the provider, unless the encoding is reported as one of those three. You should still doublecheck that it is indeed valid, using mb_check_encoding (note that valid is not the same as being - the same input may be valid for many encodings). If it is one of those, you can then use mb_detect_encoding to distinguish between them. Luckily that is fairly deterministic; You just need to use the proper detect-sequence, which is UTF-8,ISO-8859-1,WINDOWS-1252.

一旦检测到编码，就需要将其转换为内部表示(UTF-8是唯一明智的选择)。函数utf8_encode将ISO-8859-1转换为UTF-8，因此它只能用于特定的输入类型。对于其他编码，使用mb_convert_encoding。

从头文件中获取编码并将其转换为UTF-8。

$post_url = 'http://website.domain';

/// Get headers ///////////////////////////////////////////////
function get_headers_curl($url)
{
    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL,            $url);
    curl_setopt($ch, CURLOPT_HEADER,         true);
    curl_setopt($ch, CURLOPT_NOBODY,         true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT,        15);

    $r = curl_exec($ch);
    return $r;
}

$the_header = get_headers_curl($post_url);

/// Check for redirect ////////////////////////////////////////
if (preg_match("/Location:/i", $the_header)) {
    $arr = explode('Location:', $the_header);
    $location = $arr[1];

    $location = explode(chr(10), $location);
    $location = $location[0];

    $the_header = get_headers_curl(trim($location));
}

/// Get charset ///////////////////////////////////////////////
if (preg_match("/charset=/i", $the_header)) {
    $arr = explode('charset=', $the_header);
    $charset = $arr[1];

    $charset = explode(chr(10), $charset);
    $charset = $charset[0];
}

///////////////////////////////////////////////////////////////////
// echo $charset;

if($charset && $charset != 'UTF-8') {
    $html = iconv($charset, "UTF-8", $html);
}

我知道这是一个老问题，但我认为一个有用的答案不会有坏处。我在桌面应用程序、SQLite和GET/POST变量之间的编码有问题。有些会使用UTF-8，有些会使用ASCII，当涉及到外国字符时，基本上所有事情都会搞砸。

这是我的解决方案。在处理之前，它会在每个页面加载时擦除GET/POST/REQUEST(我省略了cookie，但如果需要可以添加它们)。它在标题中工作得很好。如果PHP不能自动检测到源编码，它将抛出警告，因此这些警告将被@'s抑制。

//Convert everything in our vars to UTF-8 for playing nice with the database...
//Use some auto detection here to help us not double-encode...
//Suppress possible warnings with @'s for when encoding cannot be detected
try
{
    $process = array(&$_GET, &$_POST, &$_REQUEST);
    while (list($key, $val) = each($process)) {
        foreach ($val as $k => $v) {
            unset($process[$key][$k]);
            if (is_array($v)) {
                $process[$key][@mb_convert_encoding($k,'UTF-8','auto')] = $v;
                $process[] = &$process[$key][@mb_convert_encoding($k,'UTF-8','auto')];
            } else {
                $process[$key][@mb_convert_encoding($k,'UTF-8','auto')] = @mb_convert_encoding($v,'UTF-8','auto');
            }
        }
    }
    unset($process);
}
catch(Exception $ex){}

不带auto的Try

那就是:

mb_detect_encoding($text)

而不是:

mb_detect_encoding($text, 'auto')

更多信息可以在这里找到:mb_detect_encoding