Custom page showing profile pic, need "wildcard" reference for pic changes

[bzcomputers]

I currently have a custom page showing user profile pics.

The code below is currently calling up the images without issue from the file system.

PHP Code:

$url = sprintf('customprofilepics/profilepic%d_1.gif', $registration['Registration']['user_id']); 


The issue I'm going to have is, as soon as someone updates their profile pic it will no longer show because it is hardcoded currently to "1". I need to replace the "1" with a wildcard so that it will find an image no matter how many times it's updated.

I'm just not experienced enough with php to know how to place a wildcard in that statement.

Any help would be appreciated, thanks.