PHP jQuery Pro

401 Pages·2010·11.93 MB·English

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eBook Available
Pro PHP and jQuery
Pro
Dear Reader,
In Pro PHP and jQuery, you’ll learn everything you need to know to start develop- P
ing powerful applications using the power of jQuery, AJAX and object-oriented
PHP. This book will show you the ropes and get you developing with advanced H Pro
PHP development in combination with progressive enhancement techniques in
jQuery to build highly interactive user interfaces for your applications.
P
Jason Lengstorf, Author of As you work through the sample application in this book, I'll teach you the
PHP for Absolute Beginners essentials of object-oriented PHP and get you started in jQuery from an absolute PHP

beginner's level. You'll learn everything you need to know to start building out-
a
standing user interfaces, including:
n and
• the basics of the powerful jQuery library d
• object-oriented PHP

• AJAX-powered user interface design
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• extending the jQuery library with custom plugins
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• form validation with regular expressions
jQuery

Web development is quickly becoming the medium of choice for new applica- u
tions, and your ability to create online apps with the look and feel of desktop
apps can make the difference between a good interface and a great interface. e
Along the way you'll learn useful tricks to improve your web development, and
in no time you'll be creating fantastic, user-friendly, AJAX-powered applications. r

y
Jason Lengstorf
THE APRESS ROADMAP PHP Objects, Pro PHP:
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PHP Object-Oriented Pro PHP Add quick, smooth, and easy interactivity
Solutions Refactoring
to your PHP sites with jQuery
Beginning
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Third Edition Applications with PHP Pro PHP and jQuery
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Pro PHP and jQuery

■ ■ ■
JASON LENGSTORF
Pro PHP and jQuery
Copyright © 2010 by Jason Lengstorf
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For Nate. It's 2-1 now.
Contents at a Glance
■About the Author.......................................................................................................xii
■About the Technical Reviewer..................................................................................xiii
■Acknowledgements..................................................................................................xiv
■PART 1: Getting Comfortable with jQuery....................................................................1
■Chapter 1: Introducing jQuery.....................................................................................3
■Chapter 2: Common jQuery Actions and Methods.....................................................25
■PART 2: Getting Into Advanced PHP Programming...................................................85
■Chapter 3: Object-Oriented Programming.................................................................87
■Chapter 4: Build an Events Calendar.......................................................................119
■Chapter 5: Add Controls to Create, Edit, and Delete Events...................................167
■Chapter 6: Password Protecting Sensitive Actions and Areas...............................199
■PART 3: Combining jQuery with PHP Applications..................................................233
■Chapter 7: Enhancing the User Interface with jQuery............................................235
■Chapter 8: Editing the Calendar with AJAX and jQuery...........................................263
■PART 4: Advancing jQuery and PHP.........................................................................309
■Chapter 9: Performing Form Validation with Regular Expressions.........................311
■Chapter 10: Extending jQuery..................................................................................345
■ Index.......................................................................................................................361
iv
Contents
■About the Author...................................................................................................xii
■About the Technical Reviewer..............................................................................xiii
■Acknowledgements..............................................................................................xiv
■PART 1: Getting Comfortable with jQuery................................................................1
■Chapter 1: Introducing jQuery.................................................................................3
Choosing jQuery over JavaScript.......................................................................................3
Understanding JavaScript Libraries.........................................................................................................3
Understanding the Benefits of jQuery.......................................................................................................4
Understanding the History of jQuery.........................................................................................................4
Setting Up a Testing Environment.....................................................................................4
Installing Firefox.......................................................................................................................................5
Installing Firebug......................................................................................................................................5
Including jQuery in Web Pages..........................................................................................7
Including a Downloaded Copy of the jQuery Library.................................................................................7
Including a Remotely Hosted Copy of the jQuery Library.........................................................................8
Using the Google AJAX Libraries API........................................................................................................8
Setting up a Test File.........................................................................................................8
Introducing the jQuery Function ($)..........................................................................................................9
Selecting DOM Elements Using CSS Syntax...........................................................................................10
Summary.........................................................................................................................23
■Chapter 2: Common jQuery Actions and Methods.................................................25
Understanding the Basic Behavior of jQuery Scripts.......................................................25
v
■ CONTENTS

Understanding jQuery Methods.......................................................................................25
Traversing DOM Elements......................................................................................................................26
Creating and Inserting DOM Elements....................................................................................................36
Accessing and Modifying CSS and Attributes.........................................................................................53
Affecting Result Sets..............................................................................................................................62
Using Animation and Other Effects.........................................................................................................65
Handling Events......................................................................................................................................71
Using AJAX Controls...............................................................................................................................78
Summary.........................................................................................................................84
■PART 2: Getting Into Advanced PHP Programming...............................................85
■Chapter 3: Object-Oriented Programming.............................................................87
Understanding Object-Oriented Programming.................................................................87
Understanding Objects and Classes................................................................................87
Recognizing the Differences Between Objects and Classes..................................................................88
Structuring Classes................................................................................................................................88
Defining Class Properties.......................................................................................................................89
Defining Class Methods..........................................................................................................................90
Using Class Inheritance..........................................................................................................................99
Assigning the Visibility of Properties and Methods..............................................................................103
Commenting with DocBlocks................................................................................................................110
Comparing Object-Oriented and Procedural Code.........................................................112
Ease of Implementation........................................................................................................................112
Better Organization...............................................................................................................................117
Easier Maintenance..............................................................................................................................117
Summary.......................................................................................................................117
■Chapter 4: Build an Events Calendar...................................................................119
Planning the Calendar....................................................................................................119
Defining the Database Structure..........................................................................................................119
vi
■ CONTENTS

Creating the Class Map........................................................................................................................119
Planning the Application’s Folder Structure.........................................................................................120
Modifying the Development Environment.............................................................................................122
Building the Calendar....................................................................................................124
Creating the Database..........................................................................................................................124
Connecting to the Database with a Class.............................................................................................125
Creating the Class Wrapper..................................................................................................................127
Adding Class Properties.......................................................................................................................127
Building the Constructor.......................................................................................................................129
Loading Events Data.............................................................................................................................136
Outputting HTML to Display the Calendar and Events..........................................................................143
Outputing HTML to Display Full Event Descriptions..............................................................................160
Summary.......................................................................................................................166
■Chapter 5: Add Controls to Create, Edit, and Delete Events ...............................167
Generating a Form to Create or Edit Events...................................................................167
Adding a Token to the Form.................................................................................................................169
Creating a File to Display the Form......................................................................................................171
Adding a New Stylesheet for Administrative Features.........................................................................172
Saving New Events in the Database..............................................................................176
Adding a Processing File to Call the Processing Method.....................................................................179
Adding a Button to the Main View to Create New Events.....................................................................181
Adding Edit Controls to the Full Event View...................................................................185
Modifying the Full Event Display Method to Show Admin Controls......................................................187
Adding the Admin Stylesheet to the Full Event View Page...................................................................188
Deleting Events..............................................................................................................190
Generating a Delete Button..................................................................................................................191
Creating a Method to Require Confirmation.........................................................................................192
Creating a File to Display the Confirmation Form.................................................................................195
vii
■ CONTENTS

Summary.......................................................................................................................198
■Chapter 6: Password Protecting Sensitive Actions and Areas...........................199
Building the Admin Table in the Database.....................................................................199
Building a File to Display a Login Form.........................................................................200
Creating the Admin Class..............................................................................................202
Defining the Class.................................................................................................................................202
Building a Method to Check the Login Credentials...............................................................................203
Modifying the App to Handle the Login Form Submission....................................................................213
Allowing the User to Log Out.........................................................................................218
Adding a Log Out Button to the Calendar.............................................................................................218
Creating a Method to Process the Logout............................................................................................220
Modifying the App to Handle the User Logout......................................................................................221
Displaying Admin Tools Only to Administrators.............................................................223
Showing Admin Options to Administrators...........................................................................................223
Limiting Access to Administrative Pages.............................................................................................228
Summary.......................................................................................................................231
■PART 3: Combining jQuery with PHP Applications..............................................233
■Chapter 7: Enhancing the User Interface with jQuery........................................235
Adding Progressive Enhancements with jQuery............................................................235
Setting Progressive Enhancement Goals..............................................................................................236
Include jQuery in the Calendar App...............................................................................236
Create a JavaScript Initialization File...................................................................................................237
Creating a New Stylesheet for Elements Created by jQuery.................................................................238
Creating a Modal Window for Event Data......................................................................240
Binding a Function to the Click Event of Title Links.............................................................................240
Preventing the Default Action and Adding an Active Class...................................................................240
Extracting the Query String with Regular Expressions.........................................................................241
viii