reg exp and urls

[jeanmartin]

Hello,

i want to parse a user input:

urls like:
http://www.xyz.com
should be changed into:
<a href="url">url</a>

and

image-urls like:
http://www.xyz.com/image.gif
should be changed into:
<img src="image-url">

i researched the reg exp:
[[:alpha:]]+://[^{<>[:space:]]+[[:alnum:]/]}
for url-compilation
and:
[[:alpha:]]+://[^{<>[:space:]]+[[:alnum:]/]+.(gif|jpg)}
for image-urls

the problems:
1) as u can see the reg exp for urls matches image-urls, too.
so it does not work to apply both...

2) how can in compile it aback (reg exp)?

any idea?

[bubblenut]

Run the image regexp first?

[jeanmartin]

but i use the image-url within the compilation-result.
so that the second (url-)compilation matches the image-url within:
<img src="image-url">
...