<?php function check_login() { if (isset($_SESSION['login']) && $_SESSION ['login'] === true) { return true; } return false; } function read_config() { return parse_ini_file('config/config.ini'); } function check_password_quality($pwd) { if (!isset($pwd)||strlen($pwd)<4) { return false; } return true; } function check_username($username) { if (!isset($username)||strlen($username)>20 || strlen($username)<3) { return false; } return preg_match('/^[a-zA-Z0-9@\.]+$/', $username); } ?>