How to remove Javascript Tag from Posted Content

Question

Users at My website Post Content in WYSIWYG, so they can also add harmful java script and Style sheet. so just to detect java script tag in my content I've written this regex->

$regex = "/\<script(.*?)?\>(.|\\n)*?\<\/script\>/i";

preg_match_all($regex, $html, $scripts);

print_r($scripts);

regex such that print_r($scripts) will give me:

array(
 [0] => <script src="http://example.com"></script>
 [1] => <script>// inline js$(document).ready( function() {});</script>
 )

How can i do the same with stylesheet tag and remove javascript tag and stylesheet tag. above code only detect javascript how can i remove this tag

If you replace 'script' with 'style' in your regex, you should get the style tags. — Poul Bak
– Poul Bak, Commented Apr 10, 2016 at 8:06
preg_replace("/<script(.*?)?\>(.|\\n)*?\<\/script\>/", "", $input_lines); and preg_replace("/<style(.*?)?\>(.|\\n)*?\<\/style\>/", "", $input_lines); — rock321987
– rock321987, Commented Apr 10, 2016 at 8:09

rock321987 · Accepted Answer · 2016-04-10 08:27:39Z

1

For removing tags, you can use preg_replace as

preg_replace("/<.*script.*>(.|\\n)*<\/script>/", "", $input_lines);

preg_replace("/<.*stylesheet.*>(.|\\n)*<\/stylesheet>/", "", $input_lines);

There is no need to escape < and > and you can use .* instead of (.*?)?. Also I am making it greedy for probable nested tags by using (.|\\n)* instead of (.|\\n)*?

answered Apr 10, 2016 at 8:27

rock321987

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mtfalcon31 · Accepted Answer · 2016-04-10 08:03:38Z

0

Have you tried this?

$storeHere = strip_tags(whatever_you_want_to_strip_tags_from);

answered Apr 10, 2016 at 8:03

mtfalcon31

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1 Comment

Aniket Singh Over a year ago

if i strip the tags then all <p><br><img> tag will be also removed

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