linequest/admin/login.php

<?php
require_once('../templates/templates.php');
$template = getTemplate('admin_login.html');
$context = ['errors' => '','post_url' => '../admin/login.php'];

function errorMessage () {
    global $context;
    $errorAlert = getTemplate('error_alert.html');
    $context['errors'] = parseTemplate($errorAlert, ['message'=>'Error. Certifique-se que os dados informados estão corretos']);
}
if (!empty($_POST)) {
    require_once('../controller/forms.php');
    require_once('../config/linequest.php');
    require_once('../controller/validator.php');

    global $CFG;
    Validator::check(['senha'], $_POST);
    $password = Validator::str($_POST['senha']);
    try {
        $valid = strcmp($password, $CFG->viewpass) === 0;
        if ($valid) {
            session_start();
            $_SESSION['auth'] = md5($password.time());
            header('Location: index.php');
            exit;
        }
        errorMessage();
    } catch (Exception $e) {
        errorMessage();
    }
}
echo parseTemplate($template, $context);