After handling where we want our request to go, we will often need to write specific logic to handle the details of our HTTP request. To help facilitate this, Yii2 represents the HTTP request within the yii\web\Request object, which can provide a variety of information about the HTTP request, such as the request body, GET and POST parameters, and headers. Each request in Yii2 can be accessed easily through the request application component, which is represented by Yii::$app->request in our code.
The most common task we'll perform when working with the request object is retrieving GET and POST parameters, which are implemented by yii\web\Request::get() and yii\web\Request::post() respectively. These methods enable us to consistently and safely access the $_GET and $_POST parameters of our application:
$request = \Yii::$app->request; // Retrieve all of the $_GET parameters // similar to $get = $_GET $get = $request->get(); // Retrieve...