public static function get_instance()
{
if (!isset(self::$instance)) {
$c = __CLASS__;
self::$instance = new $c();
}
return self::$instance;
}
<?php
/*
Plugin Name: LiveChat
Plugin URI: http://www.livechatinc.com/addons/wordpress/
Description: Live chat software for live help, online sales and customer support. This plugin allows to quickly install LiveChat on any WordPress website.
Author: LiveChat
Author URI: http://www.livechatinc.com
Version: 3.2.14
*/
if (is_admin()) {
require_once dirname(__FILE__) . '/plugin_files/LiveChatAdmin.class.php';
LiveChatAdmin::get_instance();
} else {
require_once dirname(__FILE__) . '/plugin_files/LiveChat.class.php';
LiveChat::get_instance();
}