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,
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
POST parameters, which are implemented by
yii\web\Request::post() respectively. These ...