phpcms判斷用戶是否登錄的方法：

首先要獲取userid

<?php         $userid= param::get_cookie('_userid'); ?>

然后再判斷是否為空

{if $userid}           。。。這里寫已經(jīng)登錄之后的代碼。。。 {else} {/if}

phpcms判斷用戶是否登錄實(shí)現(xiàn)代碼在phpcms/modules/member/的index.php中：

<?php  defined('IN_PHPCMS') or exit('No permission resources.'); class MY_index extends index {     private $times_db;     public function __construct() {         parent::__construct();     } 	public function top_mini() { 		$_username = param::get_cookie('_username'); 		$_userid = param::get_cookie('_userid'); 		$siteid = isset($_GET['siteid']) ? intval($_GET['siteid']) : ''; 		$jsoncallback=isset($_GET['jsoncallback']) ? $_GET['jsoncallback'] : ''; 		//定義站點(diǎn)id常量 		if (!defined('SITEID')) { 		   define('SITEID', $siteid); 		} 		if($_username){ 			$res["success"]=1; 			$res["message"]='&nbsp;&nbsp;'.L('hellow').'<a href="'.APP_PATH.'member-account_manage_avatar.html" target="_blank">;<img style="display:inline;vertical-align: middle;padding:1px;width:16px;height:16px;border-radius:100%;border:1px solid #dedede;" src="'.get_memberavatar($_userid,1,30).'" width="16" height="16" onerror="this.src=''.IMG_PATH.'member/nophoto.gif'">;</a>;&nbsp;'.get_nickname().' 歡迎回家 <a href="'.APP_PATH.'member-index.html" target="_blank">;'.L('member_center').'</a>; | <a href="'.APP_PATH.'member-fabu.html" target="_top" class="upv_btn">;發(fā)布信息</a>; | <a href="'.APP_PATH.'member-logout.html">;'.L('logout').'</a>;'; 			$res["message"] = pc_base::load_config('system', 'charset') == 'gbk' ? iconv('utf-8', 'utf-8', $res["message"]) : $res["message"]; 			//get_nickname();//, 			 			} 		else{ 			$res["success"]=0; 			} 			 		if($jsoncallback){       		echo $jsoncallback . "({"items":[".json_encode($res)."]})"; 		}else{ 			echo json_encode($res); 		} 		//echo json_encode($res); 	}  } ?>

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