正则表达式提取没有特定参数的HTML标记（修复WordPress插件）

Question

I need the help of some RegEx-Experts to fix a bug in a WordPress-Plugin, which is no longer maintained by the author.

Inside the plugin there is the following php-sytax to find included scripts:

'/(\\s*)(<script\\b[^>]*?>)([\\s\\S]*?)<\\/script>(\\s*)/i'

This line filters scripts no matter for what media they are written. To fix an bug this line must be changed, so that script tags with the parameter media="print" are not extracted.

How must this line be chanced that script tags with parameter media="print" are not affected?

See here for the topic in the WordPress-Support-Forum.

Answer 1

preg are not meant to match HTML tags. You'll never know where and how attributes will be defined :

<script media="print">
<script media=print>
<script type="text/javascript" media="print">
<script media="print" type="text/javascript">

Basically, you cannot handle that in a good way with pregs. I'd suggest you to extract the html you want to clean into some DOM (or even SimpleXML) object and get all script tags where attributes are "print" with an xpath function

//script[media="print"]