Advanced Regular Expressions

registered · Posted: Fri Apr 07, 2006 8:48 am

I'm not too big on regular expressions. I can use the simple ones, but I've not found anything so far that I can understand to help with this.

To replace the awkward iframe, I'm writing a PHP wrapper (specifically a phpNuke module, but besides the point) to load pages from ViewCVS. I'm using file_get_contents to grab them.

I have to rewrite the links to use the wrapper. str_replace doesn't quite work.. I will have nasty glitches with it. I see how GoogleTap uses preg_replace for global replacement rules. But since these links don't follow any standards like phpNuke paths, I hope to do this

Replace

Quote:

with something like

Quote:

I need to do specific changes to the links with A HREF only, depending on how it is used
"#name" needs to be preserved to the same page
"index.php?name=red&test=2" needs to preserve with urlencode so it passes the correct query
"folder/test/test2.php" needs to prefix the current query path so it loads the correct file

I'll need to do the same thing for the FORM code, but I figure if I can get my head around this part, I can do it the same way. Thoughts?

registered · Posted: Fri Apr 07, 2006 9:07 am

This is untested, but in the neighborhood.

Code:

$string = preg_replace('#<\s*?a\s*?href=("|')(.*)("|').*>#i','<a href="modules.php?name=CVS&query=$2">',$string);

Good place to test out everything is http://www.rexv.org

Posted: Fri Apr 07, 2006 4:19 pm

Thanxs I'll take a look and try it out Smile

registered · Posted: Fri Apr 07, 2006 4:43 pm

I find this site EXTREMELY useful for reg expressions:

http://regexlib.com/Default.aspx

It's an odd place, and takes a while to get used to, but give it a whirl. As a matter of fact, I suggest bookmarking it... Wink

Regular Joined: Mar 26, 2006 Posts: 87 Location: UK

Not being a coder/programmer I've been often frustrated when needing to use a regexp.

What I have found very helpful is the expression wizard built into Only registered users can see links on this board! Get registered or login!.

Quote:

Agent Ransack is a free tool for finding files and information on your hard drive fast and efficiently. When searching the contents of files Agent Ransack displays the text found so you can quickly browse the results without having to separately open each file!

Agent Ransack provides compelling advantages over similar search tools:

Regular expressions that allow complex rule based searches.
Immediate contents results view.
Various wizards to walk the user through the searching process.