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Yii2 Application Development Cookbook

Yii2 Application Development Cookbook

By : Andrew Bogdanov, Eliseev
4.5 (2)
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Yii2 Application Development Cookbook

Yii2 Application Development Cookbook

4.5 (2)
By: Andrew Bogdanov, Eliseev

Overview of this book

Yii is a free, open source web application development framework written in PHP5 that promotes clean DRY design and encourages rapid development. It works to streamline your application development time and helps to ensure an extremely efficient, extensible, and maintainable end product. Being extremely performance optimized, Yii is a perfect choice for any size project. However, it has been built with sophisticated, enterprise applications in mind. You have full control over the configuration from head-to-toe (presentation-to-persistence) to conform to your enterprise development guidelines. It comes packaged with tools to help test and debug your application, and has clear and comprehensive documentation. This book is a collection of Yii2 recipes. Each recipe is represented as a full and independent item, which showcases solutions from real web-applications. So you can easily reproduce them in your environment and learn Yii2 fast and without tears. All recipes are explained with step-by-step code examples and clear screenshots. Yii2 is like a suit that looks great off the rack, but is also very easy to tailor to fit your needs. Virtually every component of the framework is extensible. This book will show how to use official extensions, extend any component, or write a new one. This book will help you create modern web applications quickly, and make sure they perform well using examples and business logic from real life. You will deal with the Yii command line, migrations, and assets. You will learn about role-based access, security, and deployment. We’ll show you how to easily get started, configure your environment, and be ready to write web applications efficiently and quickly.
Table of Contents (14 chapters)
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Preface
Preface
What this book covers
What you need for this book
Who this book is for
Sections
Conventions
Reader feedback
Customer support
Free Chapter
1
1. Fundamentals
1. Fundamentals
Introduction
Installing the framework
Application templates
Dependency injection container
Service locator
Code generation
Configuring components
Working with events
Using external code
2
2. Routing, Controllers, and Views
2. Routing, Controllers, and Views
Introduction
Configuring URL rules
Generating URLs
Using regular expressions in URL rules
Using a base controller
Using standalone actions
Creating a custom filter
Displaying static pages
Using flash messages
Using the controller context in a view
Reusing views with partials
Using blocks
Using decorators
Defining multiple layouts
Pagination and sorting data
3
3. ActiveRecord, Model, and Database
chevron up
3. ActiveRecord, Model, and Database
Introduction
Getting data from a database
Defining and using multiple DB connections
Customizing the ActiveQuery class
Processing model fields with AR event-like methods
Automating timestamps
Setting up an author automatically
Setting up a slug automatically
Transactions
Replication and read-write splitting
Implementing single table inheritance
4
4. Forms
4. Forms
Introduction
Writing your own validators
Uploading files
Adding and customizing CaptchaWidget
Customizing Captcha
Creating a custom input widget
Tabular input
Conditional validation
Complex forms with multiple models
AJAX-dependent drop-down list
AJAX validation
Creating a custom client-side validation
5
5. Security
5. Security
Introduction
Authentication
Using controller filters
Preventing XSS
Preventing SQL injections
Preventing CSRF
Using RBAC
Encrypting/Decrypting data
6
6. RESTful Web Services
6. RESTful Web Services
Introduction
Creating a REST server
Authentication
Rate limiting
Versioning
Error handling
7
7. Official Extensions
7. Official Extensions
Introduction
Authentication client
SwiftMailer e-mail library
Faker fixture data generator
Imagine library
MongoDB driver
ElasticSearch engine adapter
Gii code generator
Pjax jQuery plugin
Redis database driver
8
8. Extending Yii
8. Extending Yii
Introduction
Creating helpers
Creating model behaviors
Creating components
Creating reusable controller actions
Creating reusable controllers
Creating a widget
Creating CLI commands
Creating filters
Creating modules
Creating a custom view renderer
Creating a multilanguage application
Making extensions distribution-ready
9
9. Performance Tuning
9. Performance Tuning
Following best practices
Speeding up session handling
Using cache dependencies and chains
Profiling an application with Yii
Leveraging HTTP caching
Combining and minimizing assets
Running Yii2 on HHVM
10
10. Deployment
10. Deployment
Introduction
Changing the Yii directory layout
Moving an application webroot
Changing an advanced application template
Moving configuration parts into separate files
Using multiple configurations to simplify the deployment
Implementing and executing cron jobs
Maintenance mode
Deployment tools
11
11. Testing
11. Testing
Introduction
Testing application with Codeception
Unit testing with PHPUnit
Unit testing with Atoum
Unit testing with Behat
12
12. Debugging, Logging, and Error Handling
12. Debugging, Logging, and Error Handling
Introduction
Using different log routes
Analyzing the Yii error stack trace
Logging and using the context information
Displaying custom errors
Custom panel for debug extension
13
Index
Index

Processing model fields with AR event-like methods

Active Record implementation in Yii is very powerful and has many features. One of these features is the event-like methods, which you can use to preprocess model fields before putting them into the database or getting them from a database, as well as to delete data related to the model, and so on.

In this recipe, we will link all URLs in the post text and list all existing Active Record event-like methods.

Getting ready

  1. 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.

  2. Set up the database connection and create a table named post, as follows:

    DROP TABLE IF EXISTS 'post';
CREATE TABLE IF NOT EXISTS 'post' (
    'id' INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
    'title' VARCHAR(255) NOT NULL,
    'text' TEXT NOT NULL,
     PRIMARY KEY ('id')
);

  3. Generate the post model using Gii.

How to do it...

  1. Add the following method to models/Post...

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