/**
* Creates root(first) module instance.
*
* Do not use directly.
*/
public static function create_root()
{
ob_start();
try {
$default_module = Variable::get('default_module');
self::$root = ModuleManager::new_instance($default_module, null, '0');
} catch (Exception $e) {
self::$root = ModuleManager::new_instance(FIRST_RUN, null, '0');
}
$ret = trim(ob_get_contents());
if (strlen($ret) > 0 || self::$root == null) {
trigger_error($ret, E_USER_ERROR);
}
ob_end_clean();
return self::$root;
}