/** * Return a random string made of lowercase letters, uppercase letters and digits * * @param number $length The length of the string to get * @return string */ public static function get_alphanumeric_random_string($length = 10) { return StringTool::get_random_string($length, 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890'); }