function randomPrefix($length) { $random= “”; srand((double)microtime()*1000000); $data = “AbcDE123IJKLMN67QRSTUVWXYZ”; $data .= “aBCdefghijklmn123opq45rs67tuv89wxyz”; $data .= “0FGH45OP89”; for($i = 0; $i < $length; $i++) { $random .= substr($data, (rand()%(strlen($data))), 1); } return $random; } ?>