public function actionCode()
{
$res = new Codeimage(140, 42, 4);
$session = Yii::$app->session;
$session->set('login_code', $res->getCode());
$res->showCode();
}
public function actionCode()
{
// 如果是get有数据 则是为了请求验证验证码
// 如果不是 则是为了请求验证码图片
$session = Yii::$app->session;
$res = new Codeimage(140, 42, 4);
$session->set('passwordstepcode', $res->getCode());
$res->showCode();
}
public function actionIndex()
{
$res = new Codeimage(140, 42, 4);
$res->showCode();
}