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Mastering Yii

You're reading from   Mastering Yii Advance your modern web application development skills with Yii Framework 2

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Product type Paperback
Published in Jan 2016
Publisher Packt
ISBN-13 9781785882425
Length 380 pages
Edition 1st Edition
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Tools
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Author (1):
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Charles R. Portwood ll Charles R. Portwood ll
Author Profile Icon Charles R. Portwood ll
Charles R. Portwood ll
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Toc

Table of Contents (15) Chapters Close

Preface 1. Composer, Configuration, Classes, and Path Aliases FREE CHAPTER 2. Console Commands and Applications 3. Migrations, DAO, and Query Building 4. Active Record, Models, and Forms 5. Modules, Widgets, and Helpers 6. Asset Management 7. Authenticating and Authorizing Users 8. Routing, Responses, and Events 9. RESTful APIs 10. Testing with Codeception 11. Internationalization and Localization 12. Performance and Security 13. Debugging and Deploying Index

Events


Often when working with complex code bases, we may implement hooks and handlers so that our application can call custom code outside our main application flow. In Yii2, these handlers are called events, which can be automatically executed when a given event is triggered. For example, in a blogging platform, we may create an event to indicate that a post was published, which will trigger some custom code to send out an email to users in a specific mailing list. In this section, we'll cover how to create event handlers, trigger events, and write our own custom events.

Event handlers

Events in Yii2 are implemented within the yii\base\Component base class, which nearly every class in Yii2 extends from. By extending from this class, we can bind an event to nearly anywhere in our codebase. To begin working with events, we first need to create an event handler.

Event handlers in Yii2 can be bound by calling the yii\base\Component::on() method, and they specify a callback that should be executed...

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