Official Web Site: Webbots, Spiders, and Screen Scrapers, by Michael Schrenk

NOTE: This is the website for the 2nd (2012) edition of this book. If you have the 1st (2007), Chinese or Italian editions, go here.

Answers to common questions

The most common cause of problems is that cURL, MySQL or the GD graphics libraries were not properly installed. You can verify if these libraries are installed by execuring a phpinfo(); command and examining the output, which will indicate all installed external libraries.
Please note, do not use LIB_http if you are also using the "PECL pecl_http" library. Simulteneously using LIB_http.php and the PECL pecl_http library will create errors caused by redundant function names, for example: http_get().

Updates

If you think you found an error in the book, please contact the author.

On page 45, Listing 4-14

$unformatted = strip_tags($only_text);

Should be

$noformat = strip_tags( $noformat );