How does phpcms determine whether the user is logged in?

How phpcms determines whether the user is logged in:

First get the userid

and then determine whether it is empty

{if $userid} 。。。这里写已经登录之后的代码。。。 {else} {/if}

phpcms determines whether the user is logged in. The implementation code is in index.php of phpcms/modules/member/:

;;; '.get_nickname().' 欢迎回家 ;'.L('member_center').'; | ;发布信息; | ;'.L('logout').';'; $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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