Hello, try waiting more than an hour or two...
Anyway, I don't know of any * / ? / grep or anything that will work as a wildcard for PHP so I'd do it like this...
$testchar = substr($filename, 1, 1);
$testchar = strtolower($testchar);
Then test it $testchar is "b" or not.
I'm not sure on my substr functions, play about with it a bit, might be 1, 0 or 0, 1 to just select the first character.
strtolower just changs the result to a small letter of course, if you only want to remove those with "b" and not with "B", don't use it.