I thought it might be nice to have a little archive of Javascript Regular Expressions for other people coming through.
This one is for pulling <script> tags out of a string. It should match any case, account for attributes in the opening tag, and match any code including line breaks in between the tags.
First up, a code to jut match an opening <script> tag, because any open <script> tag can screw up a page, so you might want to take care of just that:
/<[Ss]*?script(s[Ss]*?)?>/gi
Next, a tag to grab a <script> tag from beginning to end, so that you can protect all the text, or replace it, or what have you.
/<[Ss]*?script(s[Ss]*?)?>[Ss]*?<[Ss]*?/script(s[Ss]*?)?>/gi
You need to escape , which you indicated the wordpress lost
Anyway, to be through, you should use
[\S\s]*?
I believe this would be SGML/XHTML compliant, but I’m not exactly sure. I also haven’t tested this regex
Thanks. Fixed it.
Btw, my earlier comment got mungled by the wordpress gnomes as well. Blah!
A few things for your readers:
1. As many already know, you can take the second example and capture the javascript code with a group () — it will save the code into a variable.
2. This is flexible for any HTML tag, just replace script with whatever you need.
3. It won’t handle nested tags.
#3 can be done by creating a recursive function, using the idea from #1. For all matched content, re-run the matching function. Return when there is no more matches within the content. Try this at home