yii2 ajax badrequest,Yii2中request的使用

1、普通的get和post请求

$request= Yii::$app->request;

$get=$request->get();

// equivalent to: $get = $_GET;

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

// equivalent to: $id = isset($_GET['id']) ? $_GET['id'] : null;

$id=$request->get('id', 1);

// equivalent to: $id = isset($_GET['id']) ? $_GET['id'] : 1;

//添加了默认值

$post=$request->post();

// equivalent to: $post = $_POST;

$name=$request->post('name');

// equivalent to: $name = isset($_POST['name']) ? $_POST['name'] : null;

$name=$request->post('name','');

// equivalent to: $name = isset($_POST['name']) ? $_POST['name'] : '';

//添加了默认值

2、判断请求属性

$request = Yii::$app->request;

if ($request->isAjax) { // 判断是否为AJAX 请求 }

if ($request->isGet) { // 判断是否为GET 请求 }

if ($request->isPost) { // 判断是否为POST 请求}

if ($request->isPut) { // 判断是否为PUT 请求 }

3、获取请求头信息

// $headers is an object of yii\web\HeaderCollection

$headers = Yii::$app->request->headers;

// 返回header头部所有信息

$accept = $headers->get('Accept');

if ($headers->has('User-Agent')) { // 获取User-Agent }

4、获取用户客户端信息

$userHost = Yii::$app->request->userHost;

$userIP = Yii::$app->request->userIP;