该问题经查常是$_SESSION丢失，在网上查找发现IE6也有不少SESSION丢失的问题，这时，就要通过COOKIE来找回登录状态，但是
includesmodulesintegratesecshop.php这个整合自身会员的类中没有重写integrate.php中的check_cookie()方法导致,验证cookie时返回的username为空，丢失了登录状态。
ecshop模板堂给出解决方案：
打开 ecshop.php 在里面加下面这段代码:
1 /** 2 * 检查cookie 3 * 4 * @access public 5 * @param 6 * 7 * @return void 8 */ 9 function check_cookie ()10 {11 if ( isset($_COOKIE['ECS']) && isset($_COOKIE['ECS']['user_id']) && isset($_COOKIE['ECS']['password']))12 {13 $ecs_user_id = $_COOKIE['ECS']['user_id'];14 $ecs_user_pass = $_COOKIE['ECS']['password'];15 $sql = "SELECT " . $this->field_name ." AS user_name".16 " FROM " . $this->table($this->user_table) .17 " WHERE ".$this->field_id." = '$ecs_user_id' AND ".$this->field_pass." = '$ecs_user_pass'";18 $username = $this->db->getOne($sql);19 if ($username && ($this->charset != 'UTF8'))20 {21 $username = ecs_iconv($this->charset, 'UTF8', $username);22 }23 return $username;24 }25 else26 {27 return '';28 }29 }