Webbots, Spiders, and Screen Scrapers: A Guide to Developing Internet Agents with PHP/CURL
The Internet is bigger and better than what a mere browser allows. Webbots, Spiders, and Screen Scrapers is for programmers and businesspeople who want to take full advantage of the vast resources available on the Web. There's no reason to let browsers limit your online experience-especially when you can easily automate online tasks to suit your individual needs.
Learn how to write webbots and spiders that do all this and more:
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LibraryThing ReviewUser Review - GShuk - LibraryThing
If you know PHP this is an excellent book. It comes with a library and detailed project examples on how to scrape the web from someone who is very experienced. It is very well laid out. Read full review
Webbots, Spiders, and Screen Scrapers is first book I have read on Web robots. Book is very good for beginners and gives moderate understanding of subject.
Book assumes that reader should have basic understanding of PHP which is good keeping the topic it is covering.
Though Author covers library written by him but that makes book good for beginners and does not bog down the first timers to web robots.
Schrenk also covers legal issues which may arise while designing and writing web robots which is fair warning to any developer.
Book also has its web site which gives latest information about subject.
This book certainly be in by book shelf for long.