ereg_replace to remove all non-alphanumerics is skipping square brackets

Question

I have the following code that should strip all non-alphanumeric characters (excluding hyphens) from some text. It somehow misses square brackets somehow, however.

ereg_replace('[^A-z0-9-]', '', strtolower(str_replace(' ','-',$title)))

Can anyone advise?

Answer 1

I made a mistake and wrote A-z instead of a-z. A-z encompasses the [ and ] characters.