Kể từ khi PHP không phải là hệ điều hành phụ thuộc vào chúng ta sẽ được cài đặt và cấu hình PHP cho UNIX và Windows. PHP chức năng cũng hỗ trợ đệ quy. Đệ quy chỉ đơn giản là khi chức năng tự gọi mình. Một trong những cách dễ nhất để giải thích đệ quy chỉ là để cho bạn thấy, thực hiện việc này, ví dụ: | s THOMSON Ga PHP rũgramming Matt Rutledge THOMSON COURSE TECHNOLOGY Professional Trade Reference 2004 by Premier Press a division of Course Technology. All rights reserved. No part of this book may be reproduced or transmitted in any form or by any means electronic or mechanical including photocopying recording or by any information storage or retrieval system without written permission from Course PTR except for the inclusion of brief quotations in a review. The Premier Press logo and related trade dress are trademarks of Premier Press and may not be used without written permission. Paint Shop Pro 8 is a registered trademark of Jasc Software. PHP Coder is a trademark of phpIDE. All other trademarks are the property of their respective owners. Important Course PTR cannot provide software support. Please contact the appropriate software manufacturer s technical support line or Web site for assistance. Course PTR and the author have attempted throughout this book to distinguish proprietary trademarks from descriptive terms by following the capitalization style used by the manufacturer. Information contained in this book has been obtained by Course PTR from sources believed to be reliable. However because of the possibility of human or mechanical error by our sources Course PTR or others the Publisher does not guarantee the accuracy adequacy or completeness of any information and is not responsible for any errors or omissions or the results obtained from use of such information. Readers should be particularly aware of the fact that the Internet is an everchanging entity. Some facts may have changed since this book went to press. Educational facilities companies and organizations interested in multiple copies or licensing of this book should contact the publisher for quantity discount information. Training manuals CD-ROMs and portions of this book are also available individually or can be tailored for specific needs. ISBN 1-59200-153-X Library of Congress Catalog Card