CAPITAL or small

[prokhaled]

This code:

1: $MESSAGE = "(img)http://site.con/photo.gif(/img)";

2: $MESSAGE = str_replace("(IMG)", "<IMG src='", $MESSAGE);
3: $MESSAGE = str_replace("(/IMG)", "'>", $MESSAGE);

4: $MESSAGE = str_replace("(img)", "<IMG src='", $MESSAGE);
5: $MESSAGE = str_replace("(/img)", "'>", $MESSAGE);

to replace (img)http://site.con/photo.gif(/img) to HTML img code, and I repeat line 2,3
because may be user right (IMG) Capital or small.

Qusetion : There are any function to replace string to another string if this string capital
or small untill I do not repeat the code.