Using "regular expressions"

Isolating URL's in a long string

[zoltek]

Hi,

Let's say I have a long string, which could contain a URL.

The URL can be in one of three formats at this points (ignore the spaces before the tags):

[ url]http://www.link.com[ /url]
[ url=http://www.link.com]Link Title[ /url]
[link.com...]

I'm trying to use preg_match_all() to isolate all instances of a link and store it in an array.

The problem is, I'm not sure what sort of 'regexs' I can use to isolate those links.

Any help would be greatly appreciated.

[mcavill]

I'm no Regex or PHP expert - but something like:

"http://((.¦\n)*?)(\.com¦\.net¦\.co\.uk¦\.org¦\.info¦\.biz)" may work (you'll need to add more domainname extentions)...and I'm sure there's better ways of doing it....

[edited by: ergophobe at 12:24 am (utc) on Feb. 14, 2005]

[zoltek]

Great. Thanks! I'll see if that code works.

[edited by: ergophobe at 12:25 am (utc) on Feb. 14, 2005]

[ergophobe]

If you Google on

regular expressions
regular expressions tutorial
regular expressions reference

You'll get a week's worht of good reading. Enjoy!

[jamie]

zoltek,

why not download one of the popular php forums and see what they do as well?

i have tried this and it is not so easy to catch all

[zoltek]

I finally got it to work, at least in terms of catching the formats URL's take in forum posts.

"/http:\/\/[^\s\[\]]*/"