index.php

<?php

define('ROOT_PATH', __DIR__);
define('SYSTEM_PATH', ROOT_PATH . '/includes');
define('INSTALLATION_PATH', SYSTEM_PATH . '/installation');
define('CONTENT_PATH', ROOT_PATH . '/content');
define('LAYOUT_PATH', ROOT_PATH . '/layout');

// bootstrap DIWA
require_once SYSTEM_PATH . '/bootstrap.php';

// is HTTP Basic Auth enabled?
if(
    isset($config['auth']['username'])
    && !empty($config['auth']['username'])
    && isset($config['auth']['password'])
    && !empty($config['auth']['password'])
) {
    if (
        !isset($_SERVER['PHP_AUTH_USER'])
        || !isset($_SERVER['PHP_AUTH_PW'])
        || $_SERVER['PHP_AUTH_USER'] !== $config['auth']['username']
        || $_SERVER['PHP_AUTH_PW'] !== $config['auth']['password']
    ) {
        header('WWW-Authenticate: Basic realm="DIWA"');
        header('HTTP/1.0 401 Authorization Required');
        echo 'Please enter correct username and password.';
        exit;
    }
}

// perform a reset?
if(isset($_GET['reset']) && 'diwa' == $_GET['reset']) {
    try {
        if(!include(INSTALLATION_PATH . '/install.php')) {
            die('Error: could not include "install.php".');
        }
        else {
            die('DIWA\'s Database has been resetted!<br/><a href="/">Back to DIWA</a>');
        }
    }
    catch(Exception $ex) {
        die('Error: could not include "install.php": ' . $ex->getMessage());
    }
}

// start output buffering
ob_start();

// include header
require_once LAYOUT_PATH . '/header.php';

// include content
if(isset($_GET['page'])) {
    $content = $_GET['page'];
}
else {
    $content = 'home';
}

$contentFile = CONTENT_PATH . '/' . $content . '.php';

if(file_exists($contentFile)) {
    require_once $contentFile;
}
else {
    require_once CONTENT_PATH . '/404.php';
}

// include footer
require_once LAYOUT_PATH . '/footer.php';

// Send content
ob_end_flush();