CODEWITHSUNDEEP
phphtmlregexpreg-replace
Thompson
Thompson

Reputation: 2000

Correct Regex for strip unwanted comments from HTML

I want a regular expression which can strip all comments from the HTML using PHP.

I saw some threads on stackoverflow like Regexp match strickly html comment string, but the regex provided there doesn't work. My PHP code outputs nothing after I apply the provided code.

I have written:

$regex = array('/<!--((.*)!(\[if))-->/Uis', "/[[:blank:]]+/");
$replaced_comment_in_html = preg_replace($regex, '', $html);

But it shows comments the HTML:

<!-- This is my test comment, which I want to be removed in HTML  -->
<!--[if lt IE 9]>
    <script src="something.js"></script>
<![endif]-->

It does not remove the comments that I want to be removed, and if I write the below regex, then it removes all comments (also the IE style and scripts, which are required on the page)

$regex = array('/<!--(.*)-->/Uis', "/[[:blank:]]+/");

Can someone help?

Upvotes: 0

Views: 139

Answers (1)

Amit Joki
Amit Joki

Reputation: 59292

Use this regex:

<!--[^\[].*-->

This will not remove IE comments, but will remove other comments.

Use it like this:

$regex = array('/<!--[^\[].*-->/Uis', "/[[:blank:]]+/");
$replaced_comment_in_html = preg_replace($regex, '', $html);

Upvotes: 1

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