error; } if ($_SESSION['user_type'] === 'U' && isset($_SESSION['phone'])) { $login = true; } function generateRandomString($length = 10) { $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_'; $charactersLength = strlen($characters); $randomString = ''; for ($i = 0; $i < $length; $i++) { $randomString .= $characters[rand(0, $charactersLength - 1)]; } return $randomString; } function error_msg($msg, $refer = null) { $_SESSION['error_msg'] = "