Book Image

Yii2 By Example

By : Fabrizio Caldarelli
Book Image

Yii2 By Example

By: Fabrizio Caldarelli

Overview of this book

Yii is a high-performance PHP framework best for developing Web 2.0 applications. It provides fast, secure, and professional features to create robust projects, however, this rapid development requires the ability to organize common tasks together to build a complete application. It's all too easy to get confused; this is where this book comes in. This book contains a series of practical project examples for developers starting from scratch. Each section contains the most relevant theories for every topic as you walk through developing each project, focusing on key aspects that commonly confuse users. The book starts with all the framework’s basic concepts, such as controllers and views, to introduce you to Yii and creating your first application, a simple news reader. You will be learn to configure URL rules to make a pretty URL, essential for search engine optimization. Next, you will walk through Model and ActiveRecord, key concepts in database interaction. The second application you will develop is a reservation system that allows you to manage rooms, customers, and reservations. For this, you will use database connection through SQL and ActiveRecord. More complex than the first one, this application will introduce you to the advanced template of Yii 2, splitting the app into two parts: a frontend for all visitors and a backend for the admin. Finally, you will move on to the last two applications: one that allows connections from remote clients, through RESTful components of Yii 2, and another that creates and organizes automatic tasks using the console application structure of Yii 2.
Table of Contents (20 chapters)
Yii2 By Example
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Creating a Model


The first step to manipulate data between View and Controller is to create a Model. A Model is a class that extends the Model class located under yii\base\, the base used for data models.

This is a suitable class for providing simple solutions in order to encapsulate data, assign content from array (form data), and validate data using rules. The Model base class implements the following commonly used features:

  • Attribute declaration: By default, every public class member is considered a model attribute; we can access all the members using the attributes property of Model.

  • Attribute labels: Each attribute may be associated with a label for display purposes; we can extend the attributeLabels() method to return labels related to public members of Model.

  • Massive attribute assignment: We can fill the member's content of Model by passing an entire array of values. This is convenient when we need to fill a model with data from the form.

  • Scenario-based validation: Model provides rules...