PHP 5 for DUMmIES.pdf

PHP 5

FOR

DUMmIES

‰

by Janet Valade

PHP 5 For Dummies®

Published by

Wiley Publishing, Inc.

111 River Street

Hoboken, NJ 07030

www.wiley.com

Published by Wiley Publishing, Inc., Indianapolis, Indiana

Published simultaneously in Canada

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Library of Congress Control Number: 2003105680

ISBN: 0-7645-4166-8

Manufactured in the United States of America

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About the Author

Janet Valade is the author of PHP & MySQL For Dummies. In addition, she has

authored and revised chapters for several Linux books and for a Webmaster

certification book.

Janet Valade has 20 years experience in the computing field. She worked as a

Web designer/programmer for an engineering firm. Prior to that, Janet worked

for several years in a university environment as a systems analyst. During her

tenure, she supervised the installation and operation of computing resources,

designed and developed a data archive, provided technical support for faculty

and students, wrote numerous technical papers, and developed and pre-

sented seminars and workshops on a variety of technology topics.

Dedication

This book is dedicated to anyone who finds it useful.

Acknowledgments

I wish to express my appreciation to the entire Open Source community.

Without those who give their time and talent, there would be no cool PHP for

me to write about. Furthermore, I never would have learned this software

without the PHP lists where people generously spend their time answering

foolish questions from beginners. Many ideas have come from reading ques-

tions and answers on the lists.

Publisher’s Acknowledgments

We’re proud of this book; please send us your comments through our online registration form

located at www.dummies.com/register/.

Some of the people who helped bring this book to market include the following:

Acquisitions, Editorial, and

Media Development

Project Editors: Kala Schrager,

Christopher Morris

Acquisitions Editor: Terri Varveris

Senior Copy Editors: Kim Darosett,

Teresa Artman

Technical Editor: Szemir Khangyi

Editorial Manager: Kevin Kirschner

Media Development Manager:

Laura VanWinkle

Media Development Supervisor:

Richard Graves

Editorial Assistant: Amanda Foxworth

Cartoons: Rich Tennant (www.the5thwave.com)

Production

Project Coordinator: Maridee Ennis

Layout and Graphics: Andrea Dahl,

Joyce Haughey, Stephanie D. Jumper,

Michael Kruzil, Heather Ryan,

Jacque Schneider

Proofreaders: Carl Pierce, TECHBOOKS

Production Services

Indexer: TECHBOOKS Production Services

Publishing and Editorial for Technology Dummies

Richard Swadley, Vice President and Executive Group Publisher

Andy Cummings, Vice President and Publisher

Mary C. Corder, Editorial Director

Publishing for Consumer Dummies

Diane Graves Steele, Vice President and Publisher

Joyce Pepple, Acquisitions Director

Composition Services

Gerry Fahey, Vice President of Production Services

Debbie Stailey, Director of Composition Services

Contents at a Glance

Introduction ................................................................1

Part I: Say Hello to the PHP Scripting Language ...........7

Chapter 1: Getting to Know PHP ......................................................................................9

Chapter 2: Setting Up the Environment ........................................................................19

Chapter 3: Creating Your First PHP Script ....................................................................35

Part II: Variables and Data ........................................51

Chapter 4: Using Variables in PHP Scripts ...................................................................53

Chapter 5: Working with Data ........................................................................................73

Chapter 6: Storing Data in Groups by Using Arrays ....................................................97

Part III: Basic PHP Programming .............................127

Chapter 7: Controlling the Flow of the Script ............................................................129

Chapter 8: Reusing PHP Code ......................................................................................157

Chapter 9: Object-Oriented Programming Meets PHP ..............................................177

Part IV: Common PHP Applications ...........................197

Chapter 10: The Basics of Web Applications .............................................................199

Chapter 11: Other Web Applications ..........................................................................223

Chapter 12: Storing Data with PHP ..............................................................................247

Chapter 13: PHP and Your Operating System ............................................................279

Chapter 14: PHP Extensions .........................................................................................303

Part V: The Part of Tens ...........................................319

Chapter 15: Ten Things to Look For When Troubleshooting a Script ....................321

Chapter 16: Ten PHP Resources You Can’t Live Without .........................................327

Part VI: Appendixes .................................................331

Appendix A: Installing PHP............................................................................................333

Appendix B: Useful PHP Built-in Functions .................................................................353

Index .......................................................................377

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