Sort Question

Hello, I am doing a dir list of an ftp and using sort to sort the dir list alphabetically. What I am using now sorts it alphabetically but it sorts the capital letters then the lower case so a capital "Z" would come before a lower case "a" The Code I am using is: sort($complete_list); return $complete_list; Does someone know how I can sort an array alphabetically with the case insensitive sort? Thank You Brandon