functions.class.php #2 [Mike M. tutorial]

class functions{

    #region main

        #region username related
            public function check_username($username){
                $length = new stdClass();
                $length->min = 4;
                $length->max = 10;
                $length->username = strlen($username);
                if($length->username >= $length->min && $length->username <= $length->max){
                    return ctype_alnum($username);
                }else{
                    return false;
                }
            }

            public function username_exists($username){
            //get the username from the database
            global $dbhost, $dbusername, $dbpassword, $dbname;
            $con = new Database($dbhost, $dbusername, $dbpassword, $dbname);
            $query = $con->runQuery("SELECT * FROM `users` WHERE `username`='".$username."'");
            if($query->rowCount() != 0){
                while($row_info = $query->fetch(PDO::FETCH_ASSOC)){
                    $userInfo = new stdClass();
                    $userInfo->UID = $row_info['ID'];
                    $userInfo->UName = $row_info['username'];
                    $userInfo->UPass = $row_info['password'];
                    $userInfo->USalt = $row_info['salt'];
                    //userInfo is succesfully loaded!
                    //close the connection
                    $con = null;
                    //return the password!
                    return true;
                }
            }else{
                //error spotted make sure to close just in case
                //close the connection
                $con = null;
                return false;
            }
        }
        #end

        #region password related
            public function check_password($password){
                $length = new stdClass();
                $length->min = 6;
                $length->max = 20;
                $regex = '/^[a-zA-Z0-9 \!\@\#\$\%\^\&\*]{'.$length->min.','.$length->max.'}$/';
                if(preg_match($regex, $password)){
                    return true;
                }else{
                    return false;
                }
            }

            public function create_hashed_password($password, $salt){
                $blowFishSalt = '$2y$12$'.$salt.'$';
                return(crypt($password.$salt,$blowFishSalt));
            }

    #end

    #end