允许用户以PHP提交HTML [英] Allow user submitted HTML in PHP

问题描述

我想允许很多用户提交的html用于用户个人资料，我目前尝试过滤掉我不想要的内容，但现在我想更改并使用白名单方法.

I want to allow a lot of user submitted html for user profiles, I currently try to filter out what I don't want but I am now wanting to change and use a whitelist approach.

这是我当前的非白名单方法

Here is my current non-whitelist approach

function FilterHTML($string) {
    if (get_magic_quotes_gpc()) {
        $string = stripslashes($string);
    }
    $string = html_entity_decode($string, ENT_QUOTES, "ISO-8859-1");
    // convert decimal
    $string = preg_replace('/&#(\d+)/me', "chr(\\1)", $string); // decimal notation
    // convert hex
    $string = preg_replace('/&#x([a-f0-9]+)/mei', "chr(0x\\1)", $string); // hex notation
    //$string = html_entity_decode($string, ENT_COMPAT, "UTF-8");
    $string = preg_replace('#(&\#*\w+)[\x00-\x20]+;#U', "$1;", $string);
    $string = preg_replace('#(<[^>]+[\s\r\n\"\'])(on|xmlns)[^>]*>#iU', "$1>", $string);
    //$string = preg_replace('#(&\#x*)([0-9A-F]+);*#iu', "$1$2;", $string); //bad line
    $string = preg_replace('#/*\*()[^>]*\*/#i', "", $string); // REMOVE /**/
    $string = preg_replace('#([a-z]*)[\x00-\x20]*([\`\'\"]*)[\\x00-\x20]*j[\x00-\x20]*a[\x00-\x20]*v[\x00-\x20]*a[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iU', '...', $string); //JAVASCRIPT
    $string = preg_replace('#([a-z]*)([\'\"]*)[\x00-\x20]*v[\x00-\x20]*b[\x00-\x20]*s[\x00-\x20]*c[\x00-\x20]*r[\x00-\x20]*i[\x00-\x20]*p[\x00-\x20]*t[\x00-\x20]*:#iU', '...', $string); //VBSCRIPT
    $string = preg_replace('#([a-z]*)[\x00-\x20]*([\\\]*)[\\x00-\x20]*@([\\\]*)[\x00-\x20]*i([\\\]*)[\x00-\x20]*m([\\\]*)[\x00-\x20]*p([\\\]*)[\x00-\x20]*o([\\\]*)[\x00-\x20]*r([\\\]*)[\x00-\x20]*t#iU', '...', $string); //@IMPORT
    $string = preg_replace('#([a-z]*)[\x00-\x20]*e[\x00-\x20]*x[\x00-\x20]*p[\x00-\x20]*r[\x00-\x20]*e[\x00-\x20]*s[\x00-\x20]*s[\x00-\x20]*i[\x00-\x20]*o[\x00-\x20]*n#iU', '...', $string); //EXPRESSION
    $string = preg_replace('#</*\w+:\w[^>]*>#i', "", $string);
    $string = preg_replace('#</?t(able|r|d)(\s[^>]*)?>#i', '', $string); // strip out tables
    $string = preg_replace('/(potspace|pot space|rateuser|marquee)/i', '...', $string); // filter some words
    //$string = str_replace('left:0px; top: 0px;','',$string);
    do {
        $oldstring = $string;
        //bgsound|
        $string = preg_replace('#</*(applet|meta|xml|blink|link|script|iframe|frame|frameset|ilayer|layer|title|base|body|xml|AllowScriptAccess|big)[^>]*>#i', "...", $string);
    } while ($oldstring != $string);
    return addslashes($string);
}

以上方法效果很好，使用2年后我从未遇到任何问题，但对于白名单方法，有什么类似于stackoverflows C#方法的方法，但是在PHP中呢? http://refactormycode.com/codes/333-sanitize-html

The above works pretty well, I have never had any problems after 2 years of use with it but for a whitelist approach is there anything similars to stackoverflows C# method but in PHP? http://refactormycode.com/codes/333-sanitize-html

推荐答案

HTML净化器是一个 符合标准的HTML过滤器 用PHP编写的库. HTML净化器 不仅会删除所有恶意 代码(更好地称为XSS)与 经过全面审核，安全可靠 许可的白名单，它也会 确保您的文件是 符合标准，仅适用于某些内容 全面实现 了解W3C的规范.

HTML Purifier is a standards-compliant HTML filter library written in PHP. HTML Purifier will not only remove all malicious code (better known as XSS) with a thoroughly audited, secure yet permissive whitelist, it will also make sure your documents are standards compliant, something only achievable with a comprehensive knowledge of W3C's specifications.

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