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PHP 5 Power Programming Gutmans_Frontmatter Page i Thursday, September 23, 2004 9:05 AM PHP 5 Power Programming perens_series_7x9.25.fmGutmans_Frontmatter Page Page ii Thursday,1 Wednesday, September September 23, 2004 15, 2004 9:05 10:54AM AM BRUCE PERENS’ OPEN SOURCE SERIES http://www.phptr.com/perens ◆ Java Application Development on Linux Carl Albing and Michael Schwarz ◆ C++ GUI Programming with Qt 3 Jasmin Blanchette, Mark Summerfield ◆ Managing Linux Systems with Webmin: System Administration and Module Development Jamie Cameron ◆ Understanding the Linux Virtual Memory Manager Mel Gorman ◆ Implementing CIFS: The Common Internet File System Christopher Hertel ◆ Embedded Software Development with eCos Anthony Massa ◆ Rapid Application Development with Mozilla Nigel McFarlane ◆ The Linux Development Platform: Configuring, Using, and Maintaining a Complete Programming Environment Rafeeq Ur Rehman, Christopher Paul ◆ Intrusion Detection with SNORT: Advanced IDS Techniques Using SNORT, Apache, MySQL, PHP, and ACID Rafeeq Ur Rehman ◆ The Official Samba-3 HOWTO and Reference Guide John H. Terpstra, Jelmer R. Vernooij, Editors ◆ Samba-3 by Example: Practical Exercises to Successful Deployment John H. Terpstra Gutmans_Frontmatter Page iii Thursday, September 23, 2004 9:05 AM PHP 5 Power Programming Andi Gutmans, Stig Sæther Bakken, and Derick Rethans PRENTICE HALL Professional Technical Reference Indianapolis, IN 46240 www.phptr.com Gutmans_Frontmatter Page iv Thursday, September 23, 2004 2:14 PM The authors and publisher have taken care in the preparation of this book, but make no expressed or implied warranty of any kind and assume no responsibility for errors or omissions. No liability is assumed for inciden- tal or consequential damages in connection with or arising out of the use of the information or programs con- tained herein. Publisher: John Wait Editor in Chief: Don O’Hagan Acquisitions Editor: Mark L. Taub Editorial Assistant: Noreen Regina Development Editor:Janet Valade Marketing Manager: Robin O'Brien Cover Designer: Nina Scuderi Managing Editor: Gina Kanouse Senior Project Editor: Kristy Hart Copy Editor: Specialized Composition Indexer: Lisa Stumpf Senior Compositor: Gloria Schurick Manufacturing Buyer: Dan Uhrig The publisher offers excellent discounts on this book when ordered in quantity for bulk purchases or special sales, which may include electronic versions and/or custom covers and content particular to your business, training goals, marketing focus, and branding interests. For more information, please contact: U. S. Corporate and Government Sales (800) 382-3419 [email protected] For sales outside the U. S., please contact: International Sales [email protected] Visit us on the Web: www.phptr.com Library of Congress Cataloging-in-Publication Data: 2004107331 Copyright © 2005 Pearson Education, Inc. This material may be distrubuted only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at http://www.opencontent.org/openpub/). Pearson Education, Inc. One Lake Street Upper Saddle River, NJ 07458 Every effort was made to contact and credit all copyright holders. Use of material without proper credit is unintentional. ISBN 0-131-47149-X Text printed in the United States on recycled paper at Phoenix in Hagerstown, Maryland. First printing, [October 2004] Gutmans_Frontmatter Page v Thursday, September 23, 2004 9:05 AM To Ifat, my wife and best friend, who has patiently put up with my involement in PHP from the very beginning, and has encouraged and supported me every step of the way. Andi Gutmans To Marianne, for patience and encouragement. Stig Sæther Bakken To my parents, who care for me even when I’m not around; and to 42, the answer to life, the universe of everything. Derick Rethans Gutmans_Frontmatter Page vi Thursday, September 23, 2004 9:05 AM Gutmans_Frontmatter Page vii Thursday, September 23, 2004 9:05 AM vii Contents Foreword by Zeev Suraski Preface: Introduction and Background Chapter 1: What Is New in PHP 5? Chapter 2: PHP 5 Basic Language Chapter 3: PHP 5 OO Language Chapter 4: PHP 5 Advanced OOP and Design Patterns Chapter 5: How to Write a Web Application with PHP Chapter 6: Databases with PHP 5 Chapter 7: Error Handling Chapter 8: XML with PHP 5 Chapter 9: Mainstream Extensions Chapter 10: Using PEAR Chapter 11: Important PEAR Packages Chapter 12: Building PEAR Components Chapter 13: Making the Move Chapter 14: Performance Chapter 15: An Introduction to Writing PHP Extensions Chapter 16: PHP Shell Scripting A. PEAR and PECL Package Index B. phpDocumentor Format Reference C. Zend Studio Quick Start Index Gutmans_Frontmatter Page viii Thursday, September 23, 2004 9:05 AM Gutmans_TOC Page ix Thursday, September 23, 2004 9:06 AM Contents Foreword............................................................................................................. xxi Preface................................................................................................................xxii 1 What Is New in PHP 5? ........................................................................................1 1.1 Introduction ........................................................................................................1 1.2 Language Features .............................................................................................1 1.2.1 New Object-Oriented Model........................................................................1 1.2.2 New Object-Oriented Features...................................................................3 1.2.3 Other New Language Features ..................................................................7 1.3 General PHP Changes........................................................................................8 1.3.1 XML and Web Services ...............................................................................8 1.4 Other New Features in PHP 5 .........................................................................11 1.4.1 New Memory Manager..............................................................................11 1.4.2 Dropped Support for Windows 95.............................................................11 1.5 Summary...........................................................................................................11 2 PHP 5 Basic Language.......................................................................................13 2.1 Introduction ......................................................................................................13 2.2 HTML Embedding ............................................................................................14 2.3 Comments .........................................................................................................14 2.4 Variables............................................................................................................15 2.4.1 Indirect References to Variables ..............................................................16 2.4.2 Managing Variables ..................................................................................16 2.4.3 Superglobals ..............................................................................................18 2.5 Basic Data Types ..............................................................................................18 2.5.1 Integers ......................................................................................................19 2.5.2 Floating-Point Numbers ...........................................................................19 2.5.3 Strings........................................................................................................19 2.5.4 Booleans.....................................................................................................22 2.5.5 Null ............................................................................................................23 ix Gutmans_TOC Page x Thursday, September 23, 2004 9:06 AM x Contents 2.5.6 Resources ...................................................................................................23 2.5.7 Arrays.........................................................................................................23 2.5.8 Constants ...................................................................................................30 2.6 Operators...........................................................................................................31 2.6.1 Binary Operators .......................................................................................32 2.6.2 Assignment Operators...............................................................................32 2.6.3 Comparison Operators ..............................................................................33 2.6.4 Logical Operators ......................................................................................34 2.6.5 Bitwise Operators......................................................................................35 2.6.6 Unary Operators........................................................................................36 2.6.7 Negation Operators ...................................................................................36 2.6.8 Increment/Decrement Operators ..............................................................37 2.6.9 The Cast Operators ...................................................................................38 2.6.10 The Silence Operator...............................................................................39
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