/start.php

<?php

/**
 * Initialise global timer
 */
define('UCORE_START_TIME', microtime(true));

/**
 * When running as Command Line Interface, for example crons, initialise some required server variables
 * CLI execution is useful for bypassing the http server.
 * Usage: php <path_to_core_index> <request_uri>
 * Example: php uCore/index.php /
 */
if(PHP_SAPI == "cli")
{
  $_SERVER['HTTP_HOST'] = 'cli';
  if(isset($argv[1]))
  {
    $_SERVER['REQUEST_URI'] = $argv[1];
  }
  else
  {
    $_SERVER['REQUEST_URI'] = $argv[0];
  }
  $_SERVER['SCRIPT_NAME'] = '/' . basename(dirname(__FILE__)) . '/index.php';
  $_SERVER['REMOTE_ADDR'] = 'cli';
  putenv('HTTP_MOD_REWRITE=On');

  $q = parse_url($_SERVER['REQUEST_URI'], PHP_URL_QUERY);
  parse_str($q, $_GET);
}

/**
 * Initialise Character set to UTF8
 */
define('CHARSET_ENCODING', 'utf-8');
define('SQL_CHARSET_ENCODING', 'utf8');
define('SQL_COLLATION', 'utf8_general_ci');

/**
 * start GZIP if enabled on the server to compress output
 */
if(!ini_get('output_buffering'))
{
  ob_start();
}
$enc = isset($_SERVER['HTTP_ACCEPT_ENCODING']) ? $_SERVER['HTTP_ACCEPT_ENCODING'] : '';
define('GZIP_ENABLED', substr_count($enc, 'gzip') || substr_count($enc, 'deflate'));
if(GZIP_ENABLED)
{
  ob_start("ob_gzhandler");
}
else
{
  ob_start();
}

function fix_path($path, $slash = '')
{
  if(!$slash)
  {
    $slash = DIRECTORY_SEPARATOR;
  }
  $path = str_replace(['\\', '/'], $slash, $path);
  return str_replace($slash . $slash, $slash, $path);
}

/**
 * Define constants for directory structure:
 * PATH_ABS_CORE: absolute (server) path to core folder
 * PATH_ABS_ROOT: absolute (server) path to document root
 * PATH_REL_CORE: path to core folder relative to document root
 * PATH_REL_ROOT: path to document relative to document root (including /~UserDir/)
 * DEFAULT_FILE: relative path to core index.php
 * PATH_ABS_CONFIG: absolute path to configuration file
 * PATH_ABS_MODULES: absolute path to uModules folder
 * PATH_ABS_TEMPLATES: absolute path to uTemplates folder (DEPRECIATED)
 * PATH_ABS_THEMES: absolute path to uThemes folder
 * PATH_FULL_ROOT: full URL to root including domain and schema
 * PATH_FULL_CORE: full URL to core including domain and schema
 */
define('PATH_ABS_CORE', fix_path(dirname(__FILE__) . DIRECTORY_SEPARATOR));
define('PATH_ABS_ROOT', fix_path(realpath(PATH_ABS_CORE . '..') . DIRECTORY_SEPARATOR));

$coreDiff = fix_path(preg_replace('/^' . preg_quote(PATH_ABS_ROOT, '/') . '/', '', PATH_ABS_CORE), '/');
define('PATH_REL_ROOT', '/');
define('PATH_REL_CORE', fix_path(PATH_REL_ROOT . $coreDiff, '/'));

define('DEFAULT_FILE', PATH_REL_CORE . 'index.php');

define('PATH_ABS_CONFIG', fix_path(PATH_ABS_ROOT . 'uConfig.php'));

define('PATH_ABS_MODULES', fix_path(PATH_ABS_ROOT . 'uModules') . '/');
define('PATH_ABS_TEMPLATES', fix_path(PATH_ABS_ROOT . 'uTemplates') . '/');
define('PATH_ABS_THEMES', fix_path(PATH_ABS_ROOT . 'uThemes') . '/');

define(
  'PATH_FULL_ROOT',
  ((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . PATH_REL_ROOT
);
define(
  'PATH_FULL_CORE',
  ((!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] != 'off') ? 'https' : 'http') . '://' . $_SERVER['HTTP_HOST'] . PATH_REL_CORE
);

define('MAX_ORDER', 99999999);

/**
 * Initialise session
 */
ini_set('session.cookie_path', PATH_REL_ROOT);
session_cache_limiter(false);
session_name('ucore');
session_start();
$timeout = 3600;
if(isset($_SESSION['SESSION_LIFETIME']))
{
  $timeout = $_SESSION['SESSION_LIFETIME'];
}
if(isset($_SESSION['LAST_ACTIVITY']) && (time() - $_SESSION['LAST_ACTIVITY'] > $timeout))
{
  session_unset();
  session_destroy();
}
if(!isset($_SESSION['CREATED']))
{
  $_SESSION['CREATED'] = time();
}
if(time() - $_SESSION['CREATED'] > 1800)
{ // session started more than 30 minates ago
  session_regenerate_id(true);
  $_SESSION['CREATED'] = time();
}
$_SESSION['LAST_ACTIVITY'] = time();

/**
 * Initialise error handling
 */
include('error.php');

/**
 * Glob and load all interfaces and functs scripts
 */
foreach(glob(PATH_ABS_CORE . 'interfaces/*.php') as $fn)
{
  include($fn);
}
foreach(glob(PATH_ABS_CORE . 'functs/*.php') as $fn)
{
  include($fn);
}

/**
 * Initialise the core configuration
 */
require(PATH_ABS_CORE . 'setup.php');

/**
 * Run initialisation code
 */
require(PATH_ABS_CORE . 'initialise.php'); // init