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PHP & MySQL‰FORDUMmIES‰4THEDITION
Download from Wow! eBook www.wowebook.com PHP & MySQL‰FORDUMmIES‰4THby Janet ValadeEDITION
PHP & MySQL For Dummies, 4th EditionPublished byWiley Publishing, Inc.111 River StreetHoboken, NJ 07030-5774www.wiley.comCopyright 2010 by Wiley Publishing, Inc., Indianapolis, IndianaPublished by Wiley Publishing, Inc., Indianapolis, IndianaPublished simultaneously in CanadaNo part of this publication may be reproduced, stored in a retrieval system or transmitted in any form orby any means, electronic, mechanical, photocopying, recording, scanning or otherwise, except as permitted under Sections 107 or 108 of the 1976 United States Copyright Act, without either the prior writtenpermission of the Publisher, or authorization through payment of the appropriate per-copy fee to theCopyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, (978) 750-8400, fax (978) 646-8600.Requests to the Publisher for permission should be addressed to the Permissions Department, John Wiley& Sons, Inc., 111 River Street, Hoboken, NJ 07030, (201) 748-6011, fax (201) 748-6008, or online at http://www.wiley.com/go/permissions.Trademarks: Wiley, the Wiley Publishing logo, For Dummies, the Dummies Man logo, A Reference for theRest of Us!, The Dummies Way, Dummies Daily, The Fun and Easy Way, Dummies.com, Making EverythingEasier, and related trade dress are trademarks or registered trademarks of John Wiley & Sons, Inc. and/or its affiliates in the United States and other countries, and may not be used without written permission.MySQL is a registered trademark of MySQL AB. All other trademarks are the property of their respectiveowners. Wiley Publishing, Inc. is not associated with any product or vendor mentioned in this book.LIMIT OF LIABILITY/DISCLAIMER OF WARRANTY: THE PUBLISHER AND THE AUTHOR MAKE NOREPRESENTATIONS OR WARRANTIES WITH RESPECT TO THE ACCURACY OR COMPLETENESS OFTHE CONTENTS OF THIS WORK AND SPECIFICALLY DISCLAIM ALL WARRANTIES, INCLUDING WITHOUT LIMITATION WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE. NO WARRANTY MAY BECREATED OR EXTENDED BY SALES OR PROMOTIONAL MATERIALS. THE ADVICE AND STRATEGIESCONTAINED HEREIN MAY NOT BE SUITABLE FOR EVERY SITUATION. THIS WORK IS SOLD WITH THEUNDERSTANDING THAT THE PUBLISHER IS NOT ENGAGED IN RENDERING LEGAL, ACCOUNTING, OROTHER PROFESSIONAL SERVICES. IF PROFESSIONAL ASSISTANCE IS REQUIRED, THE SERVICES OFA COMPETENT PROFESSIONAL PERSON SHOULD BE SOUGHT. NEITHER THE PUBLISHER NOR THEAUTHOR SHALL BE LIABLE FOR DAMAGES ARISING HEREFROM. THE FACT THAT AN ORGANIZATIONOR WEBSITE IS REFERRED TO IN THIS WORK AS A CITATION AND/OR A POTENTIAL SOURCE OF FURTHER INFORMATION DOES NOT MEAN THAT THE AUTHOR OR THE PUBLISHER ENDORSES THE INFORMATION THE ORGANIZATION OR WEBSITE MAY PROVIDE OR RECOMMENDATIONS IT MAY MAKE.FURTHER, READERS SHOULD BE AWARE THAT INTERNET WEBSITES LISTED IN THIS WORK MAY HAVECHANGED OR DISAPPEARED BETWEEN WHEN THIS WORK WAS WRITTEN AND WHEN IT IS READ.For general information on our other products and services, please contact our Customer CareDepartment within the U.S. at 877-762-2974, outside the U.S. at 317-572-3993, or fax 317-572-4002.For technical support, please visit www.wiley.com/techsupport.Wiley also publishes its books in a variety of electronic formats. Some content that appears in print maynot be available in electronic books.Library of Congress Control Number: 2009940274ISBN: 978-0-470-52758-0Manufactured in the United States of America10 9 8 7 6 5 4 3 2 1
About the AuthorJanet Valade is the author of PHP & MySQL Web Development All-in-One DeskReference For Dummies, PHP 5 For Dummies, PHP & MySQL Everyday AppsFor Dummies, and PHP & MySQL: Your visual blueprint for creating dynamic,database-driven Web sites, as well as the first, second, and third editions ofthis book. In addition, Janet is the author of Spring into Linux and a coauthorof Mastering Visually Dreamweaver 8 and Flash 8.Janet has twenty years of experience in the computing field. Most recently,she worked as a Web designer and programmer in an engineering firm forfour years. Before that, Janet worked for thirteen years in a university environment, where she was a systems analyst. During her tenure, she supervised the installation and operation of computing resources, designed anddeveloped a data archive, supported faculty and students in their computerusage, wrote numerous technical papers, and developed and presented seminars on a variety of technology topics.To keep in touch, see janetvalade.com.
Author’s AcknowledgmentsFirst, I want to express my appreciation to the entire open source community. Without those who give their time and talent, there would be no coolPHP and MySQL for me to write about. Furthermore, I never would havelearned this software without the lists, where people generously spend theirtime answering foolish questions from beginners.I want to thank my mother for passing on a writing gene, along with manyother things. And my children always for everything. My thanks to my friendsArt, Dick, and Marge for responding to my last-minute call for help. I particularly want to thank Sammy, Dude, Spike, Lucky, Upanishad, Sadie, and E.B. fortheir important contributions.And, of course, I want to thank the professionals who make it all possible.Without the people at Wiley, this book would not exist. Because they all dotheir jobs so well, I can contribute my part to this joint project.
Publisher’s AcknowledgmentsWe’re proud of this book; please send us your comments at http://dummies.custhelp.com. Forother comments, please contact our Customer Care Department within the U.S. at 877-762-2974, outside the U.S. at 317-572-3993, or fax 317-572-4002.Some of the people who helped bring this book to market include the following:Acquisitions and EditorialProject Editor: Rebecca Senninger(Previous Edition: Pat O’Brien)Composition ServicesProject Coordinator: Kristie ReesAcquisitions Editor: Kyle LooperLayout and Graphics: Melissa K. Jester,Christine WilliamsCopy Editor: Virginia SandersProofreader: Toni SettleTechnical Editor: John GosneyIndexer: BIM Indexing & ProofreadingEditorial Manager: Leah CameronEditorial Assistant: Amanda FoxworthSr. Editorial Assistant: Cherie CaseCartoons: Rich Tennant (www.the5thwave.com)Publishing and Editorial for Technology DummiesRichard Swadley, Vice President and Executive Group PublisherAndy Cummings, Vice President and PublisherMary Bednarek, Executive Acquisitions DirectorMary C. Corder, Editorial DirectorPublishing for Consumer DummiesDiane Graves Steele, Vice President and PublisherComposition ServicesDebbie Stailey, Director of Composition Services
Contents at a GlanceIntroduction. 1Part I: Developing a Web Database ApplicationUsing PHP and MySQL. 7Chapter 1: Introduction to PHP and MySQL. 9Chapter 2: Setting Up Your Work Environment. 21Chapter 3: Developing a Web Database Application. 47Part II: MySQL Database. 73Chapter 4: Building the Database. 75Chapter 5: Protecting Your Data. 111Part III: PHP. 131Chapter 6: General PHP. 133Chapter 7: PHP Building Blocks for Programs. 165Chapter 8: Data In, Data Out. 211Chapter 9: Moving Information from One Web Page to the Next. 285Part IV: Applications. 305Chapter 10: Putting It All Together. 307Chapter 11: Building an Online Catalog. 321Chapter 12: Building a Members Only Web Site. 359Part V: The Part of Tens. 387Chapter 13: Ten Things You Might Want to Do Using PHP Functions. 389Chapter 14: Ten PHP Gotchas. 397Part VI: Appendixes. 403Appendix A: Installing PHP, MySQL, and Apache from XAMPP. 405Appendix B: Configuring PHP. 415Index. 421
Table of ContentsIntroduction. 1About This Book. 1Conventions Used in This Book. 2What You’re Not To Read. 2Foolish Assumptions. 3How This Book Is Organized. 3Part I: Developing a Web Database ApplicationUsing PHP and MySQL. 4Part II: MySQL Database. 4Part III: PHP. 4Part IV: Applications. 4Part V: The Part of Tens. 4Part VI: Appendixes. 4Icons Used in This Book. 5Where to Go from Here. 5Part I: Developing a Web Database ApplicationUsing PHP and MySQL. 7Chapter 1: Introduction to PHP and MySQL . . . . . . . . . . . . . . . . . . . . . . . 9What Is a Web Database Application?. 9The database: Storing data. 11The application: Moving data in and out of the database. 11MySQL, My Database. 12Advantages of MySQL. 13How MySQL works. 14Communicating with the MySQL server. 14PHP, a Data Mover. 15Advantages of PHP. 16How PHP works. 16MySQL and PHP, the Perfect Pair. 17Advantages of the relationship. 18How MySQL and PHP work together. 18Keeping Up with PHP and MySQL Changes. 19PHP versions. 19MySQL versions. 20
xiiPHP & MySQL For Dummies, 4th EditionChapter 2: Setting Up Your Work Environment . . . . . . . . . . . . . . . . . . . 21Anatomy of a Web Site. 21Building a Web Site. 22Deciding Where to Publish Your Web Site. 23Using a Web hosting company. 24Using a company Web site. 28Setting up your own server.
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