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){}

首先必须检测使用了什么编码。在解析RSS提要时(可能通过HTTP)，应该从Content-Type HTTP报头字段的字符集参数中读取编码。如果不存在，则从XML处理指令的encoding属性中读取编码。如果也没有，请使用规范中定义的UTF-8。

以下是我可能会做的:

I’d use cURL to send and fetch the response. That allows you to set specific header fields and fetch the response header as well. After fetching the response, you have to parse the HTTP response and split it into header and body. The header should then contain the Content-Type header field that contains the MIME type and (hopefully) the charset parameter with the encoding/charset too. If not, we’ll analyse the XML PI for the presence of the encoding attribute and get the encoding from there. If that’s also missing, the XML specs define to use UTF-8 as encoding.

$url = 'http://www.lr-online.de/storage/rss/rss/sport.xml';

$accept = array(
    'type' => array('application/rss+xml', 'application/xml', 'application/rdf+xml', 'text/xml'),
    'charset' => array_diff(mb_list_encodings(), array('pass', 'auto', 'wchar', 'byte2be', 'byte2le', 'byte4be', 'byte4le', 'BASE64', 'UUENCODE', 'HTML-ENTITIES', 'Quoted-Printable', '7bit', '8bit'))
);
$header = array(
    'Accept: '.implode(', ', $accept['type']),
    'Accept-Charset: '.implode(', ', $accept['charset']),
);
$encoding = null;
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, true);
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
$response = curl_exec($curl);
if (!$response) {
    // error fetching the response
} else {
    $offset = strpos($response, "\r\n\r\n");
    $header = substr($response, 0, $offset);
    if (!$header || !preg_match('/^Content-Type:\s+([^;]+)(?:;\s*charset=(.*))?/im', $header, $match)) {
        // error parsing the response
    } else {
        if (!in_array(strtolower($match[1]), array_map('strtolower', $accept['type']))) {
            // type not accepted
        }
        $encoding = trim($match[2], '"\'');
    }
    if (!$encoding) {
        $body = substr($response, $offset + 4);
        if (preg_match('/^<\?xml\s+version=(?:"[^"]*"|\'[^\']*\')\s+encoding=("[^"]*"|\'[^\']*\')/s', $body, $match)) {
            $encoding = trim($match[1], '"\'');
        }
    }
    if (!$encoding) {
        $encoding = 'utf-8';
    } else {
        if (!in_array($encoding, array_map('strtolower', $accept['charset']))) {
            // encoding not accepted
        }
        if ($encoding != 'utf-8') {
            $body = mb_convert_encoding($body, 'utf-8', $encoding);
        }
    }
    $simpleXML = simplexml_load_string($body, null, LIBXML_NOERROR);
    if (!$simpleXML) {
        // parse error
    } else {
        echo $simpleXML->asXML();
    }
}

if(!mb_check_encoding($str)){
    $str = iconv("windows-1251", "UTF-8", $str);
}

这对我很有帮助

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

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);
}