<?php
require_once("wp-load.php");

$post = get_post($_GET['post_id']);

$sOfferLink = get_post_meta($_GET['post_id'], 'offer_link');
$affiliate = get_post_meta($_GET['post_id'], 'affiliate_clicks');

$affiliateClicks = $affiliate ? intval($affiliate[0]) : 0;

$link = $sOfferLink ? $sOfferLink[0] : false;

if($link === false) {
	echo "fehlerhafter Link";
} else {
	update_post_meta($_GET['post_id'], "affiliate_clicks", $affiliateClicks+1);
	header("location: ".$link);
	die;
}