Simple regular expression replace for picture URL

[motaweb]

I need to replace picture links inside strings like this example :

blabla http://img146.imageshack.us/img126/6348/anything.jpg blabla
for
blabla [img:http://img146.imageshack.us/img126/6348/anything.jpg] blabla

I can found them with this regex without problems : ((http(s?):)|([/|.|\w|\s])*\.(?:jpg|gif|png)

My actual replace is : [img:$&]

I didn't find a way to put my last bracket at the very end of my url with my replace.

Thanks for your help

[jhardman]

so is it showing up like this?

blabla [img:http:][img://img146.imageshack.us/img126/6348/anything.jpg] blabla

[motaweb]

@jhardman
Right, exactly what I get.

I want to remove the ][ between http:// and not repeat img in my string...

[jhardman]

try this variation, it worked on my test, but I only tested one string.

(http(s?):)?([/|.|\w|\s])*\.(?:jpg|gif|png)

I just changed one symbol, making the http(s?): optional rather than "or".

Jared

[jhardman]

never mind, I found a flaw, I put two img urls with a word in between, and it recognized it all as one phrase. Let me think just a moment, we need to disallow spaces...

[jhardman]

This worked in my tests:

(http(s)?://)?[.\w]{3,}.(jpg|gif|png)

[motaweb]

Thanks a lot, you save me lot of time learning RegEx (but still, I need to learn it anyway...)