static function getInstance()
{
if (is_null(ajax::$instance)) {
$session = session::getInstance();
$zone = $session->getData('zone');
if (!$zone) {
$zone = ZONE_DEFAULT;
$session->setData('zone', $zone);
}
if ($zone && file_exists(LOCAL_PATH . LOCAL_DIR . 'module/' . $zone . '/ajax.php')) {
require_once LOCAL_PATH . LOCAL_DIR . 'module/' . $zone . '/ajax.php';
}
if (class_exists('module_' . $zone . '_ajax')) {
$class = 'module_' . $zone . '_ajax';
ajax::$instance = new $class();
} else {
ajax::$instance = new ajax();
}
}
return ajax::$instance;
}
