index.php

<?php
/*
 * This file is part of pluck, the easy content management system
 * Copyright (c) pluck team
 * http://www.pluck-cms.org

 * Pluck is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * See docs/COPYING for the complete license.
*/

//First set the charset: utf-8.
header('Content-Type:text/html;charset=utf-8');

//Define that we are in pluck.
define('IN_PLUCK', true);

//Then start session support.
session_start();

//Check if pluck has been installed. If not, redirect.
if (!file_exists('data/settings/install.dat')) {
	header('Location: install.php');
	exit;
}

//Include security-enhancements.
require_once 'data/inc/security.php';
//Include functions.
require_once 'data/inc/functions.modules.php';
require_once 'data/inc/functions.all.php';
require_once 'data/inc/functions.site.php';
//Include variables.
require_once 'data/inc/variables.all.php';
require_once 'data/inc/variables.site.php';

run_hook('site_index');

//Then, if we have a RTL-language and theme hasn't been converted.
if (DIRECTION_RTL && !file_exists(THEME_DIR.'/style-rtl.css')) {
	//Convert theme and save CSS.
	include_once ('data/inc/themes_convert-rtl.php');
}

//Check if a page or module has been specified, if not: redirect to HOME_PAGE.
if (!defined('CURRENT_PAGE_SEONAME')) {
	header('Location: '.HOME_PAGE, true, 302);
	exit;
}

//If a module has been specified...
if (defined('CURRENT_MODULE_DIR')) {
	//Check if the module exists.
	if (file_exists('data/modules/'.CURRENT_MODULE_DIR)) {
		//And check if we also specified a module page (if not, fail).
		if (!defined('CURRENT_MODULE_PAGE')) {
			header('HTTP/1.0 404 Not Found');
			if (!defined('CURRENT_NOTFOUND')) {
                            define('CURRENT_NOTFOUND', true);
                        }
		}

		//If a module page has been set, check if we can display it.
		//1. Check if module page exists.
		//2. Check if module has been included in current page.
		//3. Check if module is compatible.
		//Otherwise, fail.
		elseif (defined('CURRENT_MODULE_PAGE')) {
			if (!function_exists(CURRENT_MODULE_DIR.'_page_site_'.CURRENT_MODULE_PAGE) || !module_is_included_in_page(CURRENT_MODULE_DIR, CURRENT_PAGE_SEONAME) || !module_is_compatible(CURRENT_MODULE_DIR)) {
				header('HTTP/1.0 404 Not Found');
				if (!defined('CURRENT_NOTFOUND')) {
                                    define('CURRENT_NOTFOUND', true);
                                }
			}
		}
	}

	//If module doesn't exist, also fail.
	else {
		header('HTTP/1.0 404 Not Found');
		if (!defined('CURRENT_NOTFOUND')) {
                    define('CURRENT_NOTFOUND', true);
                }
	}
}

//If a page has been requested that does not exist, return 404 header.
if (defined('CURRENT_PAGE_SEONAME') && !defined('CURRENT_PAGE_FILENAME')) {
	header('HTTP/1.0 404 Not Found');
	if (!defined('CURRENT_NOTFOUND')) {
            define('CURRENT_NOTFOUND', true);
        }
}

//Allow modules to manipulate theme
$page_theme = THEME;
run_hook('site_theme', array(&$page_theme));

//Allow modules to manipulate theme-filename
$page_theme_file = 'theme';
run_hook('site_theme_file', array(&$page_theme_file));

//Now, include the theme
include_once('data/themes/'.$page_theme.'/'.$page_theme_file.'.php');