namespace appcontrollers;
use yiiwebController;

class HelloController extends Controller
{
$request = YII::$app->request;

echo $request->get('id');

echo $request->post('name',3333);

if($request->isget){
echo 'is get method!';
}

echo $request->userIp;
}

class HelloController extends Controller
{
$res = YII::$app->response;

$res->statusCode = '404'; //设置状态码

$res->headers->add('pragma','no-cache'); //设置缓存
$res->headers->set('pragma','max-agge=5'); //设置缓存时间
$res->headers->remove("pragma");

$res->headers->add('location','http://www.baidu.com'); //设置跳转

$this->redirect('http://www.baidu.com',302); //控制器中直接设置跳转

$res->headers->add('content-disposition','attachment; filename="a.jpg"'); //下载文件

$res->sendFile('./b.jpg'); //包装的方法来下载文件
}

class HelloController extends Controller
{
$session = YII::$app->session;

//对象形式
$session->open(); //打开session
$session->set('user','张三'); //设置
$session->get('user'); //获取
$session->remove('user'); //删除

//数组形式
$session['user'] = '张三'; //设置
echo $session['user']; //获取
unset($session['user']); //删除

}

class HelloController extends Controller
{
public function actionIndex{
$cookies = YII::$app->response->cookies;

$cookie_data = array('name'='user','value'=>'张三');
$cookies->add(new Cookie($cookie_data)); //设置cookie
$cookies->remove('id');  //删除cookie

$cookies = YII::$app->request->cookies;  //获取cookies值
$cookies->getValue('user',20); //获取cookie值

}

}