XMWX/weixin2/zz_wxsct/test.php

<?php
ini_set("display_errors", "On");

error_reporting(E_ALL | E_STRICT);
var_dump(session_start());
// session.gc_maxlifetime =1440;
$_SESSION['nimei']='qqqq';
$_SESSION['nimei']='';
var_dump($_SESSION['nimei']);