aboutsummaryrefslogtreecommitdiff
path: root/engine/start.php
blob: db9bff0e4397d4d3b888aaf6853c2cf840b713d4 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
<?php
/**
 * Bootstraps and starts the Elgg engine.
 *
 * This file loads the full Elgg engine, checks the installation
 * state, then emits a series of events to finish booting Elgg:
 * 	- {@elgg_event boot system}
 * 	- {@elgg_event plugins_boot system}
 * 	- {@elgg_event init system}
 *
 * If Elgg is 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.  The following
 * array keys are defined by core Elgg:
 *
 * Plugin authors are encouraged to use get_config() instead of accessing the
 * global directly.
 *
 * @see get_config()
 * @see engine/settings.php
 * @global stdClass $CONFIG
 */
global $CONFIG;
if (!isset($CONFIG)) {
	$CONFIG = new stdClass;
}

$lib_dir = dirname(__FILE__) . '/lib/';

/**
 * The minimum required libs to bootstrap an Elgg installation.
 *
 * @var array
 */
$required_files = array(
	'exceptions.php', 'elgglib.php', 'views.php', 'access.php', 'system_log.php', 'export.php',
	'sessions.php', 'languages.php', 'input.php', 'install.php', 'cache.php', 'output.php'
);

// include bootstraping libs
foreach ($required_files as $file) {
	$path = $lib_dir . $file;
	if (!include($path)) {
		echo "Could not load file '$path'. "
		. 'Please check your Elgg installation for all required files.';
		exit;
	}
}

// Register the error handler
set_error_handler('__elgg_php_error_handler');
set_exception_handler('__elgg_php_exception_handler');


/**
 * Load the system settings
 */
if (!include_once(dirname(__FILE__) . "/settings.php")) {
	throw new InstallationException("Elgg could not load the settings file.");
}


// load the rest of the library files from engine/lib/
$lib_files = array(
	// these need to be loaded first.
	'database.php', 'actions.php',

	'admin.php', 'annotations.php', 'api.php', 'cache.php',
	'calendar.php', 'configuration.php', 'cron.php', 'entities.php',
	'export.php', 'extender.php', 'filestore.php', 'group.php',
	'input.php', 'install.php', 'location.php', 'mb_wrapper.php',
	'memcache.php', 'metadata.php', 'metastrings.php', 'notification.php',
	'objects.php', 'opendd.php', 'pagehandler.php',
	'pageowner.php', 'pam.php', 'plugins.php', 'query.php',
	'relationships.php', 'river.php', 'sites.php', 'social.php',
	'statistics.php', 'system_log.php', 'tags.php', 'usersettings.php',
	'users.php', 'version.php', 'widgets.php', 'xml.php', 'xml-rpc.php'
);

foreach($lib_files as $file) {
	$file = $lib_dir . $file;
	elgg_log("Loading $file...");
	if (!include_once($file)) {
		throw new InstallationException("Could not load {$file}");
	}
}

// check if the install was completed
// @todo move into function
$installed = FALSE;
try {
	$installed = is_installed();
} catch (DatabaseException $e) {}
if (!$installed) {
	header("Location: install.php");
	exit;
}

// Autodetect some default configuration settings
set_default_config();

// Trigger events
trigger_elgg_event('boot', 'system');

// Load the plugins that are active
load_plugins();
trigger_elgg_event('plugins_boot', 'system');

// Trigger system init event for plugins
trigger_elgg_event('init', 'system');

// Regenerate the simple cache if expired.
// Don't do it on upgrade because upgrade does it itself.
if (!defined('upgrading')) {
	$view = get_input('view', 'default');
	$lastupdate = datalist_get("simplecache_lastupdate_$view");
	$lastcached = datalist_get("simplecache_lastcached_$view");
	if ($lastupdate == 0 || $lastcached < $lastupdate) {
		elgg_view_regenerate_simplecache($view);
	}
	// needs to be set for links in html head
	$CONFIG->lastcache = $lastcached;
}