Web Applications Development With PHP4 2004.pdf

Web Application

Development

with PHP 4.0

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Web Application

Development

with PHP 4.0

201 West 103rd Street,

Indianapolis, Indiana 46290

Tobias Ratschiller

Till Gerken

With contributions by

Zend Technologies, LTD

Zeev Suraski

Andi Gutmans

Web Application

Development with PHP 4.0

By:Tobias Ratschiller and Till Gerken

FIRST EDITION: July, 2000

or transmitted in any form or by any means, electronic or

mechanical, including photocopying, recording, or by any

information storage and retrieval system, without written

permission from the publisher, except for the inclusion of

brief quotations in a review.

International Standard Book Number: 0-7357-0997-1

Library of Congress Catalog Card Number: 00-100402

04 03 02 01 00 7 6 5 4 3 2 1

Interpretation of the printing code:The rightmost double-

digit number is the year of the book’s printing; the right-

most single-digit number is the number of the book’s

printing. For example, the printing code 00-1 shows that the

ﬁrst printing of the book occurred in 2000.

Composed in Bembo and MCPdigital by New Riders Publishing

Printed in the United States of America

Publisher

David Dwyer

Executive Editor

Al Valvano

Managing Editor

Gina Brown

Product Marketing

Manager

Stephanie Layton

Publicity Manager

Susan Petro

Acquisitions Editors

Ann Quinn

Alan Bower

Stacey Beheler

Nancy Maragioglio

Editor

Robin Drake

Trademarks

All terms mentioned in this book that are known to be

trademarks or service marks have been appropriately capital-

ized. New Riders Publishing cannot attest to the accuracy of

this information. Use of a term in this book should not be

regarded as affecting the validity of any trademark or service

mark.Windows and Microsoft are registered trademarks of

Microsoft Corporation.

Indexer

Cheryl Lenser

Manufacturing

Coordinator

Chris Moos

Book Designer

Louisa Klucznik

Warning and Disclaimer

This book is designed to provide information about PHP.

Every effort has been made to make this book as complete

and as accurate as possible, but no warranty or ﬁtness is

implied.

The information is provided on an as-is basis.The authors

and New Riders Publishing shall have neither liability nor

responsibility to any person or entity with respect to any loss

or damages arising from the information contained in this

book or from the use of the discs or programs that may

accompany it.

Cover Designer

Aren Howell

Composition

Amy Parker

Proofreader

Jessica McCarty

Contents

Foreword xiii

Introduction xv

Target Audience xvi

Prerequisites xvii

Organization of This Book xvii

Conventions Used in This Book xviii

I Advanced PHP 1

1 Development Concepts 3

PHP for Me? 3

The Importance of Planning 4

Coding Conventions 6

Using Files to Group Functions 24

Writing Documentation 25

An API Design Example 26

Summary 30

2 Advanced Syntax 31

PHP Syntax 31

Deﬁning Constants 32

Array Functions 33

PHP and OOP 41

Linked Lists 53

Associative Arrays 63

Polymorphism and Self-Modifying Code 78

Summary 87

3 Application Design:

A Real-Life Example 89

Project Overview 90

Comparing Technologies 91

IRC Network Basics 95

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