shimmie2/core/_bootstrap.php

<?php
/*
 * Load all the files into memory, sanitise the environment, but don't
 * actually do anything as far as the app is concerned
 */

global $cache, $config, $database, $user, $page, $_tracer;

require_once "core/sys_config.php";
require_once "core/polyfills.php";
require_once "core/util.php";
require_once "vendor/autoload.php";

// set up and purify the environment
_version_check();
_sanitise_environment();

// The trace system has a certain amount of memory consumption every time it is used,
// so to prevent running out of memory during complex operations code that uses it should
// check if tracer output is enabled before making use of it.
$tracer_enabled = constant('TRACE_FILE')!==null;

// load base files
$_tracer->begin("Bootstrap");
$_tracer->begin("Opening core files");
$_shm_files = array_merge(
    zglob("core/*.php"),
    zglob("core/{".ENABLED_MODS."}/*.php"),
    zglob("ext/*/info.php")
);
foreach ($_shm_files as $_shm_filename) {
    if (basename($_shm_filename)[0] != "_") {
        require_once $_shm_filename;
    }
}
unset($_shm_files);
unset($_shm_filename);
$_tracer->end();

$_tracer->begin("Connecting to Cache");
$cache = new Cache(CACHE_DSN);
$_tracer->end();

$_tracer->begin("Connecting to DB");
$database = new Database();
$config = new DatabaseConfig($database);
$_tracer->end();

$_tracer->begin("Loading extension info");
ExtensionInfo::load_all_extension_info();
Extension::determine_enabled_extensions();
$_tracer->end();

$_tracer->begin("Opening enabled extension files");
$_shm_files = zglob("ext/{".Extension::get_enabled_extensions_as_string()."}/main.php");
foreach ($_shm_files as $_shm_filename) {
    if (basename($_shm_filename)[0] != "_") {
        require_once $_shm_filename;
    }
}
unset($_shm_files);
unset($_shm_filename);
$_tracer->end();

// load the theme parts
$_tracer->begin("Loading themelets");
foreach (_get_themelet_files(get_theme()) as $themelet) {
    require_once $themelet;
}
unset($themelet);
$page = class_exists("CustomPage") ? new CustomPage() : new Page();
$_tracer->end();

// hook up event handlers
$_tracer->begin("Loading event listeners");
_load_event_listeners();
$_tracer->end();

send_event(new InitExtEvent());
if(AUTO_DB_UPGRADE) {
	send_event(new DatabaseUpgradeEvent());
}
$_tracer->end();