Example:
What if a merchant has a site www.merchantsite.com/?productid=12345 where he wants the product id to be changed dynamically?
In that case, he can set in a banner's Destination URL the following:
www.merchantsite.com/?productid={$extra_data1}
and then for click can be used:
www.merchantsite.com/PAP/scripts/click.php?a_aid=aaa&a_bid=bbb&data1=12345
and that will redirect to www.merchantsite.com/?productid=12345
The value by which the {$extra_data1} is supposed to be replaced has to be entered by the affiliate when he/she gets the banner code in the affiliate panel. So the merchant has to tell the affiliate the available values for that variable.
www.merchantsite.com/PAP/scripts/click.php?a_aid=aaa&a_bid=bbb&data1=12345
and that will redirect to www.merchantsite.com/?productid=12345
The value by which the {$extra_data1} is supposed to be replaced has to be entered by the affiliate when he/she gets the banner code in the affiliate panel. So the merchant has to tell the affiliate the available values for that variable.