{if:(isset($user['user_id']) && $user['user_id']!='')}{$user['username']}您好，欢迎您来到{echo:$siteConfig->name}购物！[安全退出]{else:}[登录 {set:$callback = IReq::get('callback')} {if:$callback==""} 免费注册 {else:} {set:$callback=urlencode($callback);} 免费注册 {/if} ]{/if}