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

Custom columns in a grid


As mentioned in the previous paragraph, the columns property of the GridView widget is mainly filled with strings.

When we need to apply a specific format, such as currency or date/time, we can append this specification to the column name with a colon and the type used for formatting, as currency or datetime.

But the most general form of a GridView column is an object of the yii\grid\Column class, derived by the yii\grid\DataColumn class.

A GridView column extended by the yii\grid\Column class is rendered using an array with the following keys:

        [
// can be omitted, as it is the default
'class' => 'yii\grid\DataColumn',

        'attribute',    // name of model attribute
        'format',         // format use to display data
        'header',        // header of column
        'footer',        // footer of column
        'visible',        // flag to set visibility
        'content'         // callback to print data
        ],

There are also other parameters...