index.php

<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.2.4 or newer
 *
 * NOTICE OF LICENSE
 *
 * Licensed under the Open Software License version 3.0
 *
 * This source file is subject to the Open Software License (OSL 3.0) that is
 * bundled with this package in the files license.txt / license.rst.  It is
 * also available through the world wide web at this URL:
 * http://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to obtain it
 * through the world wide web, please send an email to
 * licensing@ellislab.com so we can send you a copy immediately.
 *
 * @package     CodeIgniter
 * @author      EllisLab Dev Team
 * @copyright   Copyright (c) 2008 - 2013, EllisLab, Inc. (http://ellislab.com/)
 * @license     http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 * @link        http://codeigniter.com
 * @since       Version 1.0
 * @filesource
 */

/*
 *---------------------------------------------------------------
 * SYSTEM FOLDER NAME
 *---------------------------------------------------------------
 *
 * This variable must contain the name of your "system" folder.
 * Include the path if the folder is not in the same  directory
 * as this file.
 */
    $system_path = 'system';

/*
 *---------------------------------------------------------------
 * APPLICATION FOLDER NAME
 *---------------------------------------------------------------
 *
 * If you want this front controller to use a different "application"
 * folder than the default one you can set its name here. The folder
 * can also be renamed or relocated anywhere on your server. If
 * you do, use a full server path. For more info please see the user guide:
 * http://codeigniter.com/user_guide/general/managing_apps.html
 *
 * NO TRAILING SLASH!
 */
    $application_folder = 'application';

/*
 *---------------------------------------------------------------
 * VIEW FOLDER NAME
 *---------------------------------------------------------------
 *
 * If you want to move the view folder out of the application
 * folder set the path to the folder here. The folder can be renamed
 * and relocated anywhere on your server. If blank, it will default
 * to the standard location inside your application folder. If you
 * do move this, use the full server path to this folder.
 *
 * NO TRAILING SLASH!
 */
    $view_folder = '';


/*
 * --------------------------------------------------------------------
 * DEFAULT CONTROLLER
 * --------------------------------------------------------------------
 *
 * Normally you will set your default controller in the routes.php file.
 * You can, however, force a custom routing by hard-coding a
 * specific controller class/function here. For most applications, you
 * WILL NOT set your routing here, but it's an option for those
 * special instances where you might want to override the standard
 * routing in a specific front controller that shares a common CI installation.
 *
 * IMPORTANT: If you set the routing here, NO OTHER controller will be
 * callable. In essence, this preference limits your application to ONE
 * specific controller. Leave the function name blank if you need
 * to call functions dynamically via the URI.
 *
 * Un-comment the $routing array below to use this feature
 */
    // The directory name, relative to the "controllers" folder.  Leave blank
    // if your controller is not in a sub-folder within the "controllers" folder
    // $routing['directory'] = '';

    // The controller class file name.  Example:  mycontroller
    // $routing['controller'] = '';

    // The controller function you wish to be called.
    // $routing['function'] = '';


/*
 * -------------------------------------------------------------------
 *  CUSTOM CONFIG VALUES
 * -------------------------------------------------------------------
 *
 * The $assign_to_config array below will be passed dynamically to the
 * config class when initialized. This allows you to set custom config
 * items or override any default config values found in the config.php file.
 * This can be handy as it permits you to share one application between
 * multiple front controller files, with each file containing different
 * config values.
 *
 * Un-comment the $assign_to_config array below to use this feature
 */
    // $assign_to_config['name_of_config_item'] = 'value of config item';

/*
 *---------------------------------------------------------------
 * APPLICATION ENVIRONMENT
 *---------------------------------------------------------------
 *
 * You can load different configurations depending on your
 * current environment. Setting the environment also influences
 * things like logging and error reporting.
 *
 * This can be set to anything, but default usage is:
 *
 *     development
 *     testing
 *     production
 *
 * NOTE: If you change these, also change the error_reporting() code below
 */


DEFINE('ERROR_REPORTING', 'production');

/*
 *---------------------------------------------------------------
 * ERROR REPORTING
 *---------------------------------------------------------------
 *
 * Different environments will require different levels of error reporting.
 * By default development will show errors but testing and live will hide them.
 */

switch (ERROR_REPORTING)
{
    case 'development':
        error_reporting(-1);
        ini_set('display_errors', 1);
    break;

    case 'testing':
    case 'production':
        error_reporting(E_ALL ^ E_NOTICE ^ E_DEPRECATED ^ E_STRICT);
        ini_set('display_errors', 0);
    break;

    default:
        header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
        echo 'Error Reporting is not set correctly.';
        exit(1); // EXIT_* constants not yet defined; 1 is EXIT_ERROR, a generic error.
}

// --------------------------------------------------------------------
// END OF USER CONFIGURABLE SETTINGS.  DO NOT EDIT BELOW THIS LINE
// --------------------------------------------------------------------

// The "esip" and "domain" function was written by: gustavo.andriulo@vulcabras.com.ar
// and posted here: http://www.php.net/manual/en/function.parse-url.php
function esip($ip_addr)
{
    //first of all the format of the ip address is matched
    if(preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/",$ip_addr))
    {
        //now all the intger values are separated
        $parts=explode(".",$ip_addr);
        //now we need to check each part can range from 0-255
        foreach($parts as $ip_parts)
        {
            if(intval($ip_parts)>255 || intval($ip_parts)<0)
                return FALSE; //if number is not within range of 0-255
        }
        return TRUE;
    }
    else
        return FALSE; //if format of ip address doesn't matches
}
function domain($domain)
{
    if(file_exists('hostname.php')){
        include('hostname.php');
        if(isset($hostname)){
            return $hostname;
        }
    }
    $domain_part = explode('.', $domain);
    if(strtolower($domain_part[count($domain_part)-1]) == 'localhost'){
        return 'localhost';
    }
    if(preg_match("/(?P<domain>[a-z0-9][a-z0-9\-]{1,63}\.[a-z\.]{2,6})$/i", $domain, $matches))
    {
        return $matches['domain'];
    } else {
        return $domain;
    }
}

// The "url_origin" and "full_url" function was written by: http://stackoverflow.com/users/175071/timo-huovinen
// and posted here: http://stackoverflow.com/questions/6768793/get-the-full-url-in-php
function url_origin($s, $use_forwarded_host=false)
{
    $ssl = (!empty($s['HTTPS']) && $s['HTTPS'] == 'on') ? true:false;
    $sp = strtolower($s['SERVER_PROTOCOL']);
    $protocol = substr($sp, 0, strpos($sp, '/')) . (($ssl) ? 's' : '');
    $port = $s['SERVER_PORT'];
    $port = ((!$ssl && $port=='80') || ($ssl && $port=='443')) ? '' : ':'.$port;
    $host = ($use_forwarded_host && isset($s['HTTP_X_FORWARDED_HOST'])) ? $s['HTTP_X_FORWARDED_HOST'] : (isset($s['HTTP_HOST']) ? $s['HTTP_HOST'] : null);
    $host = isset($host) ? $host : $s['SERVER_NAME'] . $port;
    return $protocol . '://' . $host;
}
function full_url($s, $use_forwarded_host=false)
{
    return url_origin($s, $use_forwarded_host) . $s['REQUEST_URI'];
}


// define ENVIRONMENT, CMS_SUBSITE and USE_SUBDOMAIN contants
if(!file_exists('./'.$application_folder.'/config/database.php')){
    define('ENVIRONMENT', 'first-time');
    define('CMS_SUBSITE', '');
    define('USE_SUBDOMAIN', FALSE);
    define('INVALID_SUBSITE', FALSE);
    $available_site = array();
}else{
    // multisite, can use GET or subdomain
    // create site.php
    if(!file_exists('./site.php')){
        $data = '<?php'.PHP_EOL;
        @file_put_contents('./site.php', $data);
    }
    if(function_exists('opcache_invalidate')){
        opcache_invalidate('./site.php');
    }
    require_once('./site.php');
    if(isset($available_site) && is_array($available_site)){
        $cms_subsite = '';
        if(isset($_GET['__cms_subsite']) && $_GET['__cms_subsite']!== NULL){
            $cms_subsite = $_GET['__cms_subsite'];
            define('USE_SUBDOMAIN', FALSE);
        }else{
            $actual_host_name = $_SERVER['HTTP_HOST'];
            $address = full_url($_SERVER);
            $parsed_url = parse_url($address);
            $check = esip($parsed_url['host']);
            $stripped_host_name = $parsed_url['host'];
            if ($check == FALSE){
                if ($stripped_host_name != ""){
                    $stripped_host_name = domain($stripped_host_name);
                }else{
                    $stripped_host_name = domain($address);
                }
            }

            // if there is an alias defined
            if(isset($site_alias[$actual_host_name]) && $site_alias[$actual_host_name] != ''){
                $cms_subsite = $site_alias[$actual_host_name];
                define('USE_SUBDOMAIN', TRUE);
            }
            // If there is subdomain, subsite determine from subdomain.
            else if (strlen($actual_host_name)> 0 &&
                ( count(explode('.',$actual_host_name)) > count(explode('.',$stripped_host_name))) 
            ){
                $host_array = explode('.', $actual_host_name);
                $cms_subsite = $host_array[0];
                define('USE_SUBDOMAIN', TRUE);
            }
        }
        // define cms_subsite and wether it is valid or not
        if($cms_subsite == '' || in_array($cms_subsite, $available_site)){
            define('CMS_SUBSITE', $cms_subsite);
            define('INVALID_SUBSITE', FALSE);
        }else{
            define('CMS_SUBSITE', $cms_subsite);
            define('INVALID_SUBSITE', TRUE);
        }
    }else{
        define('CMS_SUBSITE', '');
        define('INVALID_SUBSITE', FALSE);
    }
    // change the environment based on multisite
    define('ENVIRONMENT', CMS_SUBSITE !='' ? 'site-'.CMS_SUBSITE : 'production');
}
// save the subsite to session
if(!isset($_SESSION)){
    session_start();
}
$_SESSION['__cms_subsite'] = CMS_SUBSITE;

// is subsite is invalid then redirect to the main website.
if( INVALID_SUBSITE ||
(CMS_SUBSITE != '' && !is_dir('./'.$application_folder.'/config/site-'.CMS_SUBSITE)) ){
    $address = full_url($_SERVER);
    var_dump($address);
    // determine redirection url
    if(USE_SUBDOMAIN){
        $address_part = explode('.', $address);
        // get the protocol first
        $protocol = $address_part[0];
        $protocol_part = explode('://', $protocol);
        $protocol = $protocol_part[0].'://';
        // remove subdomain
        $address_part = array_slice($address_part, 1);
        $address = implode('.', $address_part);
        // add the protocol again        
        $address = $protocol.$address;
    }else{
        $address_part = explode('/', $address);
        $new_address_part = array();
        for($i=0; $i<count($address_part); $i++){
            // remove site-subsite part
            if($address_part[$i] == 'site-'.CMS_SUBSITE){
                break;
            }
            $new_address_part[] = $address_part[$i];
        }
        $address = implode('/', $new_address_part);
    }
    
    header('Location: '.$address);
    exit(1); // EXIT_* constants not yet defined; 1 is EXIT_ERROR, a generic error.
}

/*
 * ---------------------------------------------------------------
 *  Resolve the system path for increased reliability
 * ---------------------------------------------------------------
 */

    // Set the current directory correctly for CLI requests
    if (defined('STDIN'))
    {
        chdir(dirname(__FILE__));
    }

    if (($_temp = realpath($system_path)) !== FALSE)
    {
        $system_path = $_temp.'/';
    }
    else
    {
        // Ensure there's a trailing slash
        $system_path = rtrim($system_path, '/').'/';
    }

    // Is the system path correct?
    if ( ! is_dir($system_path))
    {
        header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
        echo 'Your system folder path does not appear to be set correctly. Please open the following file and correct this: '.pathinfo(__FILE__, PATHINFO_BASENAME);
        exit(3); // EXIT_* constants not yet defined; 3 is EXIT_CONFIG.
    }

/*
 * -------------------------------------------------------------------
 *  Now that we know the path, set the main path constants
 * -------------------------------------------------------------------
 */
    // The name of THIS file
    define('SELF', pathinfo(__FILE__, PATHINFO_BASENAME));

    // Path to the system folder
    define('BASEPATH', str_replace('\\', '/', $system_path));

    // Path to the front controller (this file)
    define('FCPATH', str_replace(SELF, '', __FILE__));

    // Name of the "system folder"
    define('SYSDIR', trim(strrchr(trim(BASEPATH, '/'), '/'), '/'));

    // The path to the "application" folder
    if (is_dir($application_folder))
    {
        if (($_temp = realpath($application_folder)) !== FALSE)
        {
            $application_folder = $_temp;
        }

        define('APPPATH', $application_folder.'/');
    }
    else
    {
        if ( ! is_dir(BASEPATH.$application_folder.'/'))
        {
            header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
            echo 'Your application folder path does not appear to be set correctly. Please open the following file and correct this: '.SELF;
            exit(3); // EXIT_* constants not yet defined; 3 is EXIT_CONFIG.
        }

        define('APPPATH', BASEPATH.$application_folder.'/');
    }

    // The path to the "views" folder
    if ( ! is_dir($view_folder))
    {
        if ( ! empty($view_folder) && is_dir(APPPATH.$view_folder.'/'))
        {
            $view_folder = APPPATH.$view_folder;
        }
        elseif ( ! is_dir(APPPATH.'views/'))
        {
            header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
            echo 'Your view folder path does not appear to be set correctly. Please open the following file and correct this: '.SELF;
            exit(3); // EXIT_* constants not yet defined; 3 is EXIT_CONFIG.
        }
        else
        {
            $view_folder = APPPATH.'views';
        }
    }

    if (($_temp = realpath($view_folder)) !== FALSE)
    {
        $view_folder = $_temp.'/';
    }
    else
    {
        $view_folder = rtrim($view_folder, '/').'/';
    }

    define('VIEWPATH', $view_folder);

/*
 * --------------------------------------------------------------------
 * LOAD THE BOOTSTRAP FILE
 * --------------------------------------------------------------------
 *
 * And away we go...
 */
require_once APPPATH.'core/MY_CodeIgniter.php';

/* End of file index.php */
/* Location: ./index.php */