HTMLPurifier prevents XSS attacks in PHP

This article introduces the content of HTMLPurifier in PHP to prevent XSS attacks. It has certain reference value. Now I share it with you. Friends in need can refer to it.

HTMLPurifier is the best I have ever used. The PHP rich text HTML filter adopts a whitelist mechanism, which effectively eliminates illegal HTML tags in user submission forms, thus preventing XSS attacks!

HTMLPurifier项目地址：http://htmlpurifier.org

Record the configuration method for use at work!

/** * * @param [type] $string [要过滤的内容] * @return [type] [description] */function filterXSS($string){ //相对index.php入口文件，引入HTMLPurifier.auto.php核心文件 require_once './Public/Admin/htmlpurifier/HTMLPurifier.auto.php'; // 生成配置对象 $cfg = HTMLPurifier_Config::createDefault(); // 以下就是配置： $cfg -> set('Core.Encoding', 'UTF-8'); // 设置允许使用的HTML标签 $cfg -> set('HTML.Allowed','p,b,strong,i,em,a[href|title],ul,ol,li,br,p[style],span[style],img[width|height|alt|src]'); // 设置允许出现的CSS样式属性 $cfg -> set('CSS.AllowedProperties', 'font,font-size,font-weight,font-style,font-family,text-decoration,padding-left,color,background-color,text-align'); // 设置a标签上是否允许使用target="_blank" $cfg -> set('HTML.TargetBlank', TRUE); // 使用配置生成过滤用的对象 $obj = new HTMLPurifier($cfg); // 过滤字符串 return $obj -> purify($string); }

HTMLPurifier's filtering function is very powerful. Here we mainly explain how to write the configuration. Only after the configuration is completed can we know how to expand it!

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