특정 길이를 가지는 임의의 문자열을 생성하여 반환하는 함수 <?function GenerateString($length) { $characters = "0123456789"; $characters .= "abcdefghijklmnopqrstuvwxyz"; $characters .= "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; $string_generated = ""; $nmr_loops = $length; while ($nmr_loops--) { $string_generated .= $characters[mt_rand(0, strlen($characters))]; } ..