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<?php
/**
* Bootstraps the Elgg engine.
*
* This file loads the full Elgg engine, checks the installation
* state, and triggers a series of events to finish booting Elgg:
* - {@elgg_event boot system}
* - {@elgg_event init system}
* - {@elgg_event ready system}
*
* If Elgg is fully uninstalled, the browser will be redirected to an
* installation page.
*
* @see install.php
* @package Elgg.Core
* @subpackage Core
*/
/*
* No settings means a fresh install
*/
if (!file_exists(dirname(__FILE__) . '/settings.php')) {
header("Location: install.php");
exit;
}
/**
* The time with microseconds when the Elgg engine was started.
*
* @global float
*/
global $START_MICROTIME;
$START_MICROTIME = microtime(true);
/**
* Configuration values.
*
* The $CONFIG global contains configuration values required
* for running Elgg as defined in the settings.php file.
*
* Plugin authors are encouraged to use elgg_get_config() instead of accessing
* the global directly.
*
* @see elgg_get_config()
* @see engine/settings.php
* @global stdClass $CONFIG
*/
global $CONFIG;
if (!isset($CONFIG)) {
$CONFIG = new stdClass;
}
$CONFIG->boot_complete = false;
$lib_dir = dirname(__FILE__) . '/lib/';
// Load the bootstrapping library
$path = $lib_dir . 'elgglib.php';
if (!include_once($path)) {
echo "Could not load file '$path'. Please check your Elgg installation for all required files.";
exit;
}
// Load the system settings
if (!include_once(dirname(__FILE__) . "/settings.php")) {
$msg = 'Elgg could not load the settings file. It does not exist or there is a file permissions issue.';
throw new InstallationException($msg);
}
// load the rest of the library files from engine/lib/
$lib_files = array(
'access.php', 'actions.php', 'admin.php', 'annotations.php', 'cache.php',
'calendar.php', 'configuration.php', 'cron.php', 'database.php',
'entities.php', 'export.php', 'extender.php', 'filestore.php', 'group.php',
'input.php', 'languages.php', 'location.php', 'mb_wrapper.php',
'memcache.php', 'metadata.php', 'metastrings.php', 'navigation.php',
'notification.php', 'objects.php', 'opendd.php', 'output.php',
'pagehandler.php', 'pageowner.php', 'pam.php', 'plugins.php',
'private_settings.php', 'relationships.php', 'river.php', 'sessions.php',
'sites.php', 'statistics.php', 'system_log.php', 'tags.php',
'user_settings.php', 'users.php', 'upgrade.php', 'views.php',
'web_services.php', 'widgets.php', 'xml.php', 'xml-rpc.php',
// backward compatibility
'deprecated-1.7.php', 'deprecated-1.8.php',
);
foreach ($lib_files as $file) {
$file = $lib_dir . $file;
elgg_log("Loading $file...");
if (!include_once($file)) {
$msg = "Could not load $file";
throw new InstallationException($msg);
}
}
// Connect to database, load language files, load configuration, init session
// Plugins can't use this event because they haven't been loaded yet.
elgg_trigger_event('boot', 'system');
// Load the plugins that are active
elgg_load_plugins();
// @todo move loading plugins into a single boot function that replaces 'boot', 'system' event
// and then move this code in there.
// This validates the view type - first opportunity to do it is after plugins load.
$view_type = elgg_get_viewtype();
if (!elgg_is_valid_view_type($view_type)) {
elgg_set_viewtype('default');
}
// @todo deprecate as plugins can use 'init', 'system' event
elgg_trigger_event('plugins_boot', 'system');
// Complete the boot process for both engine and plugins
elgg_trigger_event('init', 'system');
$CONFIG->boot_complete = true;
// System loaded and ready
elgg_trigger_event('ready', 'system');
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