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0=>’http://www.example.com/0’,

1=>’http://www.example.com/1’,

2=>’http://www.example.com/2’);

// perform redirect

header(‘HTTP/1.1 302 Found’);

header(‘Location:’. $lookup_table[$_GET[‘url_id’]]);

?>

Your URLs in this case would look like

http://www.example.com/redirect.php?redirect_id=

[number]

, and eliminate problems.

With this solution, you’re also free to use 301 redirects, which can be beneficial because 301 redirects

count as votes. (However, never do 301 redirects when the URL can be freely modified.)

If you already have a web site that redirects to the URL specified as query string parameter, you could

also simply verify that it’s a known URL before performing the redirect, like this:

<?php

// define URL lookup table

$lookup_table = array(

0=>’http://www.example.com/0’,

1=>’http://www.example.com/1’,

2=>’http://www.example.com/2’);

// extract destination URL

if (isset($_GET[‘url’]))

{

$url = $_GET[‘url’];

}

// perform redirect only if the target URL is known

if (isset($url) && in_array($url, $lookup_table))

{

header(‘HTTP/1.1 302 Found’);

header(‘Location: ‘.$url);

}

?>

Content Theft

This concept is detailed in Chapter 9, where the use of sitemaps is discussed. A black hat SEO may employ

the use of scripts to lift part or even all of another site’s content — using an RSS feed perhaps, or screen

scraping. Many take various pieces of content from many sites and glue them together, leading to what

Chris Boggs, director of online marketing of Cs Group terms as “Frankenstein content.” The spammers

who take a site’s content verbatim are more of a concern, however, and using sitemaps may prevent, or

at least reduce, the necessity of a cease and desist order.

196

Chapter 8: Black Hat SEO

c08.qxd:c08 10:59 196

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