public function check($code, $id = '') {
   /* 固定加密验证码 */
   $key = $this->authcode($this->seKey).$id;

   // 验证码不能为空
   $secode = session($key);
   dump(session());exit;

怎么还没登陆成功？session里面已经保存了好多值，这是怎么回事呀？

array(7) {
 ["yang_adm_uid"] => string(1) "1"
 ["yang_adm_username"] => string(5) "admin"
 ["yang_adm_roleid"] => int(1)
 ["yang_adm_logintime"] => string(19) "2018-02-25 15:41:52"
 ["yang_adm_loginip"] => string(7) "0.0.0.0"
 ["yang_adm_superadmin"] => bool(true)
 ["d2d977c58444271d9c780187e93f80e5a_login_1"] => array(2) {
   ["verify_code"] => string(32) "d9e3bd6626ad943c448d901b7882898d"
   ["verify_time"] => int(1519548164)
 }
}