Convert amazon UK links to a referral tag.

amazon_ref_convert.php

<?PHP

$tag = "danmil-21";

if($_POST['submit'])
{
        // Gather variables to store the submitted data and explode the values as needed
        $url = $_POST['url'];
        $array = explode("/", "$url");

        $ASIN = $array[5];

        if($array[4] != "product") {
                echo "Invalid Amazon URL.<br><strong>MUST</strong> be in the following syntax (HTTP included): <u><strong>http://www.amazon.com/gp/product/B000PLY5BE</strong></u>ref=s9_simh_gw_p147_d0_i3";
        } elseif (in_array("www.amazon.com", $array)) {
                echo "Cannot use amazon.com links";
        } else {
                header("Location: http://www.amazon.co.uk/gp/product/{$ASIN}?ie=UTF8&tag={$tag}&camp=1634&creativeASIN={$ASIN}&linkCode=xm2");
        }

}

?>

<h1>Generate Deehem's Amazon Affiliate URL</h1>

<form method="post" class="form-horizontal">
        <input type="text" name="url">
        <input type="submit" name="submit" value="Generate Amazon Link">
</form>