Zend Framework 2 Cookbook

Table of Contents

Zend Framework 2 Cookbook

Credits

About the Author

About the Reviewers

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Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Zend Framework 2 Basics

Introduction

Setting up a Zend Framework 2 project

Getting ready

How to do it…

Cloning the skeleton

Moving the skeleton

Initializing the Composer

How it works…

There's more…

See also

Handling routines

How to do it…

Setting up routing

Using SimpleRouteStack

Using TreeRouteStack

How it works…

There's more…

Namespace – Zend\Mvc\Router\Http

The Hostname class explained

The Literal class explained

Methods explained

The Part class explained

Regex explained

The Scheme class explained

The Segment class explained

Understanding dependency injection

How to do it…

Initializing the DI at call-time

Initializing the DI through a Configuration object

How it works…

The DI only gives out one instance of an object

Defining either all properties, or using a Fully Qualified (FQ) setter parameter

There's more…

Using configurations to your benefit

How to do it…

Creating a global configuration

Creating configuration that only works for a local machine

Editing your application.config.php file

How it works…

There's more…

The EventManager and Bootstrap classes

How to do it…

Using the bootstrap

Starting a session

Using the EventManager class

Changing the View output

How it works…

The Observer pattern explained

Aspect-Oriented Programming (AOP) explained

Event-driven architecture explained

There's more…

2. Translating and Mail Handling

Introduction

Translating your application

Getting ready

How to do it…

Setting up and checking the essentials

Translating strings in the controller

Translating strings in the View

Translating strings with Poedit

How it works…

Basic set up of translation in your module

There's more…

PHP array

Gettext

Ini

Localizing your application

How to do it…

So it begins

Localizing currencies

Localizing date/times

How it works…

Identifying the client language

Localizing currencies and dates

Sending mail

How to do it…

Transport\Sendmail

Transport\Smtp

Transport\File

How it works…

Sending mail through SMTP

Sending mail through files

Receiving mail

Getting ready

How to do it…

Connecting to an IMAP mail server

Connecting to a POP3 mail server

Working with flags on IMAP or Maildir connections

Maildir++ Quota system

Keeping a connection alive

How it works…

Connecting to a POP3 server

About the Maildir++ Quota system

Keeping the connection alive

There's more…

3. Handling and Decorating Forms

Introduction

Creating forms

Getting ready…

How to do it…

Creating a basic form

Defining a form that is extended from Zend\Form

Defining a form that uses the Zend\Form\Annotation

Adding elements to a Zend\Form extend form

Adding elements to an annotated form

Validating form input

How it works…

Setting up a basic form

Setting up an annotated form

Adding elements to the form

Forms, filtering, and validation

There's more…

Using form view helpers

How to do it…

Form

FormButton

FormCaptcha

FormCheckbox

FormCollection

FormColor

FormDate, FormDateTime, and FormDateTimeLocal

FormEmail

FormFile

FormHidden

FormImage

FormInput

FormLabel

FormElementErrors

How it works…

Form

FormButton

FormCaptcha

FormCheckbox

FormCollection

FormColor

FormDate, FormDateTime, and FormDateTimeLocal

FormEmail

FormFile

FormHidden

FormImage

FormInput

FormLabel

FormElementErrors

Creating a custom form element and form view helper

How to do it…

Creating the new element

Creating the new view helper

Adding view helper to the configuration

Displaying the new element

How it works…

Creating the element

What did we do

4. Using View

Introduction

Working with View

Getting ready

How to do it…

Configure the ViewManager

Set variables in the ViewModel instance

Mark up the template file

How it works…

The configuration

The ViewModel instance

The ViewStrategy class

The ViewRenderer helper

Getting ready

How to do it…

The BasePath view helper

The Doctype view helper

The URL view helper

The Partial view helper

How it works…

Zend\View\Helper\AbstractHelper

The BasePath view helper explained

The Doctype view helper explained

The URL view helper explained

The Partial view helper explained

There's more…

Creating a global layout template

Getting ready

How to do it…

Creating the main layout file

Creating the error templates

How it works…

Creating reusable Views

Getting ready

How to do it…

Use the Action view helper to get the re-usable content

Define a child to the ViewModel instance

How it works…

The Action view helper explained

Defining a child to a ViewModel instance explained

Pros and cons

Using view strategies/renderers

Getting ready

How to do it…

Adding a view strategy

The JSON strategy

The Feed strategy

How it works…

The view strategy class

The default view strategies

The JSON strategy explained

The Feed strategy explained

More about view strategies

Using context switching for a different output

Getting ready

How to do it…

Define multiple strategies to output

Determine the view model based on the Accept header

How it works…

There's more…

Writing a custom view strategy/renderer

How to do it…

Creating the XmlOutput renderer

How it works…

The XmlRenderer and XmlModel

The XmlStrategy

There's more…

5. Configuring and Using Databases

Introduction

Default database engines available

IBM DB2 driver

MySQLi driver

OCI8 driver

PGSQL driver

SQLSRV driver

PDO driver

Connecting to a database

Getting ready

How to do it…

Connecting to a MySQL database through the configuration

Connecting to multiple databases through the configuration

Connecting to a MySQL database through code

How it works…

Connecting to a MySQL database through the configuration

Connecting to multiple databases through the configuration

About the ServiceManager

Executing simple queries

Getting ready

How to do it…

Using raw SQL

Using the prepared statements

Quote identifier

Quote identifier chain

Quote (trusted) value

Quote value list

Quote identifier in fragment

How it works…

Using raw SQL

Using prepared statements

Quoting in our SQL

Using createStatement

Executing queries using TableGateway

Getting ready

How to do it…

Inserting a new record

Updating a record

Deleting a record

Advanced selects – joins conditions

How it works…

Optimizating with a DB profiler

Getting ready

How to do it…

Setting up a new profiler

How it works…

There's more…

Creating a Database Access Object

Getting ready

How to do it…

Creating our new module and configuration

Creating a connector

Creating a mapper interface

Creating an abstract mapper class

Creating a Data Transfer Object

Creating a mapper class

How it works…

About the DAO

About the recipe

6. Modules, Models, and Services

Introduction

Creating a new module

Getting ready

How to do it…

Creating the Module.php

Attaching to the loadModules.postevent

Implementing the getAutoloaderConfig

Implementing the getControllerConfig, getControllerPluginConfig and getViewHelperConfig

How it works…

Creating a new module directory

Creating the Module.php

Optionally act on ModuleManager events

Understanding the loadModules event

The loadModules.resolve event

The loadModule event

The loadModules.post

Attaching to the loadModules.post event

More specific non configuration file Module configuration

The getAutoloaderConfig method

The getControllerConfig, getControllerPluginConfig, and getViewHelperConfig methods

Using modules as a widget

Getting ready

How to do it…

Creating the Comment/Controller/Index

Using a view helper to display the comments statically

Using the forward to render the comments statically

Getting the comments through AJAX

How it works…

Using a view helper to display the comments statically

Using the forward() method to render the comments statically

Getting the comments through AJAX

About Widgetizing

A Model and a Hydrator

Getting ready

How to do it…

Accessing the Model

Creating a Hydrator

Creating a Hydrator strategy

How it works…

Think about the model's purpose

Think about the model's location

Think about the model's methods

Unit test the model

Document your class

Creating a hydrator

Creating a hydrator strategy

About models

There's more…

A basic service

Getting ready

How to do it…

Creating a service

Getting a service from within a controller

How it works…

7. Handling Authentication

Introduction

Understanding Authentication methods

Getting ready

How to do it…

The DbTable adapter

The Http adapter

How it works…

The DbTable adapter (again)

The Http adapter (again)

The Digest adapter

The LDAP adapter

About Authentication

Setting up a simple database Authentication

Getting ready

How to do it…

Setting up the module initialization

Creating the authentication service

Setting up the controller and action

How it works…

Writing a custom Authentication method

Getting ready

How to do it…

Creating our adapter

The adapter outline

Creating a getter and setter for any error messages

Making sure we have a secure connection

Checking if the certificate is an actual certificate

Checking if we have all the certificate fields

Checking if the certificate isn't expired yet

Creating a getter and setter for the Database adapter

Creating the authenticate method

How it works…

What are we trying to achieve

About certificates

There's more…

8. Optimizing Performance

Introduction

Caching and when to Cache

Getting ready

How to do it…

Caching configuration

Caching output

Caching the class map

How it works…

Understanding and using storage plugins

How to do it…

Using the ClearExpiredByFactor plugin

Using the ExceptionHandler plugin

Using the IgnoreUserAbort plugin

Using the OptimizeByFactor plugin

Using the Serializer plugin

Using any plugin

How it works…

Setting up a caching system

Getting ready

How to do it…

Benchmarking our application before cache

Implementing configuration/class map cache

Implementing the class caching

How it works…

9. Catching Bugs

Introduction

Handling Exceptions – your partner in crime

Getting ready

How to do it...

Exception classes in Zend Framework 2

Handling Exceptions on dispatch or rendering

How it works...

Exception classes in Zend Framework 2

Handling exceptions on dispatch or rendering

About try-catch

See also

Logging and how it makes your life easier

Getting ready

How to do it...

Implementing a really simple file logger

Implementing a FirePHP logger

How it works...

Implementing a really simple file logger

Implementing a FirePHP logger

About the Logger

Unit testing – why would you do it

Getting ready

How to do it...

Pseudo-code examples

How it works...

What is unit testing

When should we test? – before, or after code is written

It is a matter of discipline

Setting up and using unit testing

Getting ready

How to do it...

Setting up the test framework

How it works...

There's more...

See also

A. Setting up the Essentials

Making sure you have all that you need

Installing Zend Server Community Edition on a Linux environment

Installing Zend Server Community Edition on a Windows environment

First-time run of Zend Server

See also

Downloading Zend Framework 2 and finding its documentation

Finding Zend Framework 2

Coding in the phpcloud

The documentation and getting started guide

See also

Composer and its uses within Zend Framework 2

The composer.json file

Upgrading packages

See also

Basic Zend Framework 2 structures

Folder – config

Folder – module

Folder – public

Folder – vendor

File – init_autoloader.php

What's next?

About storage adapters and patterns

Storage adapter's implementations

Storage adapters

Apc caching

Dba caching

File system caching

Memcached caching

Memory caching

Redis caching

Session caching

WinCache caching

XCache caching

ZendServerDisk caching

ZendServerShm caching

Cache patterns

The CallbackCache pattern

The CaptureCache pattern

The ClassCache pattern

The ObjectCache pattern

The OutputCache pattern

The PatternOptions pattern

Explaining the difference

Index

Zend Framework 2 Cookbook

Zend Framework 2 Cookbook

Copyright © 2013 Packt Publishing

All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.

Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.

Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.

First published: December 2013

Production Reference: 1121213

Published by Packt Publishing Ltd.

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ISBN 978-1-84969-484-1

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Cover Image by Prashant Timappa Shetty (<sparkling.spectrum.123@gmail.com>)

Credits

Author

Josephus Callaars

Reviewers

Armando Padilla

Diego Sapriza

David Weinraub

Acquisition Editor

Joanne Fitzpatrick

Lead Technical Editor

Balaji Naidu

Technical Editors

Pratik More

Pooja Nair

Anita Nayak

Project Coordinator

Abhijit Suvarna

Proofreaders

Bridget Braund

Lesley Harrison

Indexer

Hemangini Bari

Graphics

Disha Haria

Yuvraj Mannari

Production Coordinator

Adonia Jones

Cover Work

Aditi Gajjar

Adonia Jones

About the Author

Josephus Callaars is a software developer whose passion began like so many other developers at the appropriate age of twelve. Being intrigued by mathematics and software languages such as Assembler and Java, he quickly found out that his career was to be found in the abstract side. Since 2003 he has been developing software applications commercially, and always tried to stay up-to-date with the latest technologies.

Josephus has been passionate about developing ever since, and always thought it could be done better every time. He is a Zend Certified Engineer and is regularly to be found in the open source community, where he is always on the lookout for new things to learn.

I would like to thank my wife for supporting me in everything and deciding to not kick me out of the house just yet. I would also like to thank my parents for always believing in me, and teaching me the value of hard work.

About the Reviewers

Armando Padilla has over 10 years of experience in the PHP ecosystem, working with some of the best at Yahoo where he assisted with Shine, World Cup, and Winter Olympics, also as a scalability expert, he helped the RiotGames' web-scalability team by supporting the demands of its web-based gaming community. He has written two PHP books, Beginning Zend Framework and Pro PHP Application Performance, and now spends his time as the Sr. Engineering Manager at Disney Interactive.

I would like to thank Alba Luz Guevara and my baby Amanda Luz Padilla for giving me the time to tech review this book.

Diego Sapriza is a Senior Software Engineer at CASE who loves technology and applying it to solve business-related problems. Diego lives in Uruguay where he oversees the CASE web development team as well as setting the direction and strategy for how the company delivers software development solutions.

He specializes in web technologies such as PHP, MySQL, Sphinx, JavaScript, jQuery, Python, and many more. He is also an expert in Linux Server Administration. Pulling from his experiences as a manager, CTO, developer, and consultant in the IT industry, Diego maintains his vast knowledge of web technologies through extensive research and development of the latest advancements in the field. As a result he ensures that custom applications designed for clients are focused on effective solutions and improving the built environment.

A self-proclaimed libre software evangelist, Diego spends his time near the beautiful beaches of Uruguay taking pictures and spending time with his family.

David Weinraub is a Zend Certified Engineer (ZCE) specializing in application development on the LAMP (Linux, Apache, MySQL, PHP) stack. He is passionate about clean code, structured architecture, SOLID object-oriented principles, and DRY. He has experience with Zend Framework, Slim, Lithium, MongoDB, PHPUnit, Vagrant, and a range of associated technologies.

David earned his Ph.D. in Mathematics from the State University of New York, Albany, for his work on Hopf algebras. He lives in Phuket, Thailand with his wife and two wonderful children.

Also, he's a sucker for astronomy/cosmology.

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