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Yii2 Application Development Cookbook
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Filters are objects that run before and/or after controller actions. For example, an access control filter may run before actions to ensure that they are allowed to be accessed by particular end users; a content compression filter may run after actions to compress the response content before sending them out to end users.
A filter may consist of a prefilter (filtering logic applied before actions) and/or a postfilter (logic applied after actions). Filters are essentially a special kind of behavior. Therefore, using filters is the same as using behaviors.
Let's assume that we have a web application, which provides a user interface for working only at specified hours, for example, from 10 AM to 6 PM.
Create a new application using the Composer package manager, as described in the official guide at http://www.yiiframework.com/doc-2.0/guide-start-installation.html.
Create a controller, @app/controllers/TestController.php
, as follows:
<?php namespace...
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