如何使用PHP从HTML文档中删除所有javascript ?

In my email program I use Tidy to clean up the HTML before I send out the emails. A problem is beginning to persist that if I send a mail fetching the html from a url on the web there may exist some javascript in the document.

在我的电子邮件程序中，我使用Tidy清理HTML，然后再发送电子邮件。一个问题开始持续，如果我发送一个从web上的url获取html的邮件，文档中可能存在一些javascript。

I want to clean up this html document even more by stripping out all javascript, embedded, referenced and in any form so that the mail exist only of html.

我想通过去掉所有的javascript、嵌入的、引用的和任何形式的html文档来清理这个html文档，以便邮件只存在于html中。

I want to use php's preg_replace() to strip out all javascript from a mail and I need some help with the best regex because it's not my strongest point i must confess.

我想使用php的preg_replace()从邮件中删除所有javascript，我需要使用最好的regex，因为这不是我必须承认的最优点。

5 个解决方案

#1

echo preg_replace('/<script\b[^>]*>(.*?)<\/script>/is', "", $var);

As shown here.

如下所示。

#2

You can use strip_tags, passing in the tags you wish to allow (whitelist) as the second parameter, but that will not remove inline JS - which might be present in onclick properties and such.

您可以使用strip_tags，将您希望允许的标记(whitelist)作为第二个参数传递给它，但这不会删除内联JS——这可能存在于onclick属性等中。

echo strip_tags($html, '<p><a><small>');

#3

Look at Create a regex to strip javascript from Html article. And Part 2.

查看如何创建一个regex来从Html文章中删除javascript。和第2部分。

#4

There's no guarantee with this(as below) but I tried to make my light weight solution because html purifier (http://htmlpurifier.org) is a few huge for my tiny goal. My goal is to preventing XSS and nothing more so the result for XSS attempts will be a lot of dirty things for this code BUT I think it will be SAFE :

这并没有保证(如下所示)，但是我尝试着让我的轻量级解决方案，因为html净化器(http://htmlpurifier.org)对于我的小目标来说是巨大的。我的目标是防止XSS的出现，因此XSS尝试的结果将会是很多脏东西，但我认为它是安全的:

<?
//href="javascript:
//style="....expression
//style="....behavior
//<script
//on*="
$str = '
    asd 
    <a STyLE="asd; expression" hRef=" javascript:" onx="asd">asd</a>
    asd
    <code><a href="javascript:">asd</a></code>
    <scr<script></script>ipt ... >asd</script>
    <a style="hey:good boy;" href="javascript:">asd</a>';

function stripteaser($str, $StripHTMLTags = true, $AllowableTags = NULL) {
    $str = explode('<code>', $str);
    $codes = array();
    if (count($str) > 1) {
        foreach ($str as $idx => $val) {
            $val = explode('</code>', $val);
            if (count($val) > 1) {
                $uid = md5(uniqid(mt_rand(), true));
                $codes[$uid] = htmlentities(array_shift($val), ENT_QUOTES, 'UTF-8');
                $str[$idx] = "##$uid##" . implode('', $val);
            }
        }
    }
    $str = implode('', $str);
    while (stripos($str, '<script') !== false) {
        $str = str_ireplace('<script', '&lt;script', $str);
    }
    $rptjob = function(&$str, $regexp) {
                while (preg_match($regexp, $str, $matches)) {
                    $str = str_ireplace($matches[0], htmlentities($matches[0], ENT_QUOTES, 'UTF-8'), $str);
                }
            };
    $rptjob($str, '/href[\s\n\t]*=[\s\n\t]*[\"\'][\s\n\t]*(javascript:|data:)/i'); //href = "javascript:
    $rptjob($str, '/style[\s\n\t]*=[\s\n\t]*[\"][^\"]*expression/i'); //style = "...expression
    $rptjob($str, '/style[\s\n\t]*=[\s\n\t]*[\'][^\']*expression/i'); //style = '...expression
    $rptjob($str, '/style[\s\n\t]*=[\s\n\t]*[\"][^\"]*behavior/i'); //style = "...behavior
    $rptjob($str, '/style[\s\n\t]*=[\s\n\t]*[\'][^\']*behavior/i'); //style = '...behavior
    $rptjob($str, '/on\w+[\s\n\t]*=[\s\n\t]*[\"\']/i'); //onasd = "
    if ($StripHTMLTags)
        $str = strip_tags($str, $AllowableTags);
    foreach ($codes as $idx => $code) {
        $str = str_replace("##$idx##", $code, $str);
    }
    return $str;
}

echo stripteaser($str);
exit;
?>

:D Dirty code for this moon at home and ... However it's not a good job (a lot of while conditions take a few CPU time) but it's better than another huge component like html purifier for my tiny goal.

:i’我在家里用的是这个月亮的脏代码。然而，这并不是一项很好的工作(很多情况下需要花费一些CPU时间)，但是对于我的小目标来说，它比另一个巨大的组件(比如html净化器)要好。

RESULT WILL BE:

结果将是:

asd 
<a STyLE=&quot;asd; expression" hRef=&quot; javascript:" onx=&quot;asd">asd</a>
asd
&lt;a href=&quot;javascript:&quot;&gt;asd&lt;/a&gt;
<scri&lt;script></script>pt ... >asd</script>
<a style="hey:good boy;" href=&quot;javascript:">asd</a>

I have no experience to css expressions but I know about behavior using for JS VML in IE for curved corners so can be dangerous. AND FINALLY THERE IS NO AND NO GUARANTEE.

我对css表达式没有经验，但我知道在IE中使用JS VML处理弧线角的行为是危险的。最后，没有也没有保证。

I hope it can be useful for some friend ;)

我希望它对某些朋友有用;

#5

I used this one:

我用这个:

//remove js,css,head.....
static function cleanElements($html){

  $search = array (
         "'<script[^>]*?>.*?</script>'si",  //remove js
          "'<style[^>]*?>.*?</style>'si", //remove css 

      "'<head[^>]*?>.*?</head>'si", //remove head
     "'<link[^>]*?>.*?</link>'si", //remove link
     "'<object[^>]*?>.*?</object>'si"
                  ); 
        $replace = array ( 
              "",
                                   "",
              "",
              "",
              ""
                      );                 
  return preg_replace ($search, $replace, $html);
 }

http://allenprogram.blogspot.pt/2012/04/php-remove-js-css-head-obj-elements.html

Removes all tags, scripts and styles, except body and html, so after using it, i use strip_tags.

除去主体和html之外的所有标记、脚本和样式，因此在使用之后，我使用strip_tags。

#1

echo preg_replace('/<script\b[^>]*>(.*?)<\/script>/is', "", $var);