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Figure 5-3

4.

Load

http://seophp.example.com/aff_test.php?a=1&aff_id=34&b=2

, and expect to

be redirected to

http://localhost/seophp/aff_test.php?a=1&b=2

, with the affiliated ID

being retained, as shown in Figure 5-4.

Figure 5-4

Although you’ve written quite a bit of code, it’s pretty straightforward. There’s no URL rewriting involved,

so you’re working with plain-vanilla PHP scripts this time.

Your

aff_test.php

script starts by loading

url_utils.inc.php

and

config.inc.php

, and starting the

PHP session:

<?php

// include URL utils library

require_once ‘include/url_utils.inc.php’;

// load configuration script

require_once ‘include/config.inc.php’;

// start PHP session

session_start();

Then you verify if the

aff_id

query string parameter is present. In case it is, you save its value to the user ’s

session, and redirect to a version of the URL that doesn’t contain

aff_id

. The

remove_query_param()

function from the URL utils library is very handy, because it correctly preserves all existing parameters:

// redirect affiliate links

if (isset($_REQUEST[‘aff_id’]))

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Chapter 5: Duplicate Content

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