Regex Expression text only containing URL

[ConradJones]

I'm after a regex expression to determine if a item of text contains only a URL and nothing else (Spam rule)

 

I'm thinking this should be possible and am reading about it at the moment, if anyone already knows what it is please post it.!

 

My regex is a little rusty, so I've a little catching up to do.

[ConradJones]

okay so i've answered my own question,

 

Regular Expression Library

[sonofsanta]

You may like: Regex Tester. Has been a godsend for me.

[Arthur]

Here's another good regex since it also matches short URLs such as goo.gl, bit.ly and t.co.

 

(?i)\b((?:https?://|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'".,<>?«»“”‘’]))

 

Source: Daring Fireball

 

http://i.imgur.com/55kLKcN.png

Edited June 11, 2013 by Arthur