Help with mod_rewite rule

Question

I have a rule that will get the extension of every file from the url. I need to match all jpg, gif, png and bmp files. This is for a watermark application. Currently, it only matches jpg and Jpg. Can someone help me match all four extensions?

Here is what I currently have so far.

RewriteRule ^(.*\.[jJgG].*)$ /test.php?i=$1

Answer 1

This will do it:

RewriteRule ^(.*\.(jpg|gif|bmp|png))$ /test.php?i=$1 [NC]

Note that the rule in your post is actually matching any file whose extension starts with a J or a G.

Answer 2

RewriteRule ^(.+\.(jpg|gif|png)(\?.*)?)$   /test.php?i=$1 [NC]

The [NC] enables case insensible matching. Additionally, the first .+ cares for non-empty file names. The (\?.*)? part matches optional query strings.