Wild Card with unlink

I'm trying to delete two files in on fell shoop. One is defined with $file2 // returns "filename without extension" $filename_small = substr($file1, 8, 10); // returns define location and file name to delete $file2 = "/home/httpd/vhosts/servername/httpdocs/photoalbum/$filename_small"; // the other file name has _small appended to it with it's owen extension (png, jpg, gif, etc.) // I thought it would be this but it doesn't work unlink("$file2"."_small.*"); Thanks