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php|architect’s Guide to Web Scraping with PHP by Matthew Turland
php|ar chitect’s Guide to W eb Scraping Contents Copyright ©2009–2010 Matthew T urland – All Rights Reserved Book and cover layout, design and text Copyright ©2004-2010 Marco Tabini & Associates, Inc. – All Rights Reserved First Edition: March 2010 ISBN: 978-0-9810345-1-5 Produced in Canada Printed in the U nited States No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by means without the prior written permission of the publisher, excet in the case of brief quotations embedded in critical reviews or articles. Disclaimer Although every effort has been made in the preparation of this book to ensure the accuracy of the information contained therein, this book is provided ”as-is ” and the publisher, the author(s), their distributors and retailers, as well as all affiliated, related or subsidiary parties take no responsibility for any inaccuracy and any and all damages caused, either directly or indirectly, by the use of such information. W e have endeavoured to properly provide trademark information on all companies and products mentioned in the book by the appropriate use of capitals. However, we cannot guarantee the accuracy of such information. Marco Tabini & Associates, The MT A logo , php|architect, the php|architect logo , NanoBook and the NanoBook logo are trademarks or registered trademarks of Marco Tabini & Associates, Inc. W ritten by Published by Publisher T echnical Reviewer Layout and Design Managing Editor Finance and Resource Management Cover picture Matthew T urland Marco Tabini & Associates, Inc. 28 Bombay A ve. Toronto, ON M3H 1B7 Canada (416) 630-6202 / (877) 630-6202 info@phparch.com / www .phparch.com Marco Tabini Luke Giuliani Arbi Arzoumani Beth T ucker Long Emanuela Corso Vladimir Fofanov
Page 1: php|architect’s Guide to Web Scra
Page 7 and 8: vi ” CONTENTS Referring URLs . .
Page 9 and 10: viii ” CONTENTS HTTP Authenticati
Page 11: x ” CONTENTS Chapter 14 — PCRE
Page 15 and 16: xiv ” CONTENTS pleted. Each had a
Page 18 and 19: For ewor d W eb scraping is the fut
Page 21 and 22: Chapter 1 Introduction If you are l
Page 23 and 24: Introduction ” 3 in some instance
Page 25: Introduction ” 5 • Chapters 3-7
Page 28 and 29: 8 ” HTTP R equests The HTTP proto
Page 30 and 31: 10 ” HTTP http://en.wikipedia.org
Page 32 and 33: 12 ” HTTP i Query String Limits M
Page 34 and 35: 14 ” HTTP Server: Apache X-Powere
Page 36 and 37: 16 ” HTTP set, it will persist fo
Page 38 and 39: 18 ” HTTP Content Caching Two met
Page 40 and 41: 20 ” HTTP as 0-499. To specify fr
Page 42 and 43: 22 ” HTTP • Initialize a reques
Page 44: 24 ” HTTP W rap-U p At this point
Page 49 and 50: HTTP Streams W rapper ” 29 Let
Page 51 and 52: HTTP Streams W rapper ” 31 Error
Page 53:
HTTP Streams W rapper ” 33 ); ?>
Page 56 and 57:
36 ” cURL Extension Simple R eque
Page 58 and 59:
38 ” cURL Extension Setting M ult
Page 60 and 61:
40 ” cURL Extension • CURLOPT_R
Page 62 and 63:
42 ” cURL Extension containing th
Page 64 and 65:
44 ” cURL Extension operate unpre
Page 66:
46 ” cURL Extension • The sessi
Page 70 and 71:
50 ” pecl_http PECL Extension bal
Page 72 and 73:
52 ” pecl_http PECL Extension •
Page 74 and 75:
54 ” pecl_http PECL Extension Deb
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56 ” pecl_http PECL Extension ass
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58 ” pecl_http PECL Extension );
Page 81 and 82:
Chapter 6 P EAR::HTTP_Client The PH
Page 83 and 84:
PEAR::HTTP_Client ” 63 • sendRe
Page 85 and 86:
PEAR::HTTP_Client ” 65 • By def
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PEAR::HTTP_Client ” 67 } ?> $url
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PEAR::HTTP_Client ” 69 • http:/
Page 92 and 93:
72 ” Zend_Http_Client // Another
Page 94 and 95:
74 ” Zend_Http_Client Configurat
Page 96 and 97:
76 ” Zend_Http_Client getLastResp
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78 ” Zend_Http_Client HTTP A uthe
Page 102 and 103:
82 ” Rolling Y o u Own r $stream
Page 104 and 105:
84 ” Rolling Y o u Own r Logic to
Page 106:
86 ” Rolling Y o u Own r See RFC
Page 110 and 111:
90 ” T i d y Extension direct inp
Page 112 and 113:
92 ” T i d y Extension public fun
Page 114 and 115:
94 ” T i d y Extension There are
Page 116:
96 ” T i d y Extension Output Obt
Page 120 and 121:
100 ” DOM Extension T y p of P e
Page 122 and 123:
102 ” DOM Extension ties include
Page 124 and 125:
104 ” DOM Extension // A slightly
Page 126 and 127:
106 ” DOM Extension // Also retur
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108 ” DOM Extension • //@id add
Page 130:
110 ” DOM Extension • DOM Level
Page 134 and 135:
114 ” SimpleXML Extension The co
Page 136 and 137:
116 ” SimpleXML Extension foreach
Page 138:
118 ” SimpleXML Extension W r a
Page 142 and 143:
122 ” XMLReader Extension Loading
Page 144 and 145:
124 ” XMLReader Extension false o
Page 146 and 147:
126 ” XMLReader Extension cate to
Page 149 and 150:
Chapter 13 CSS Selector Libraries T
Page 151 and 152:
CSS Selector Libraries ” 131 Abou
Page 153 and 154:
CSS Selector Libraries ” 133 •
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
CSS Selector Libraries ” 139 It
Page 163 and 164:
Chapter 14 PCRE Extension There are
Page 165 and 166:
PCRE Extension ” 145 Anchors Y o
Page 167 and 168:
PCRE Extension ” 147 // Matches
Page 169 and 170:
PCRE Extension ” 149 if (preg_mat
Page 171 and 172:
PCRE Extension ” 151 The first wa
Page 173 and 174:
PCRE Extension ” 153 • T ouse a
Page 177 and 178:
T i p sand T r i c k s Chapter 15 C
Page 179 and 180:
T i p s and T r i c ” k 159 s not
Page 181 and 182:
T i p s and T r i c ” k 161 s W e
Page 185 and 186:
A p p e n d i x A Legality of W e S
Page 187:
Legality of W e b Scraping ” 167
Page 190 and 191:
170 ” M u l t i p r o c e s s i n
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