Sets the Infusionsoft referral partner tracking cookie based on a URL parameter, so it can be passed to a subdomain.

set-infusionsoft-tracking-cookie.php

<?php

// Sets the Infusionsoft referral partner tracking cookie based on a URL parameter, so it can be passed to a subdomain.

function set_infusionsoft_tracking_cookie() {

	if ( ! empty( $_GET['affiliate'] ) ) {
		setcookie( 'is_aff', $_GET['affiliate'], time() + ( 30 * DAY_IN_SECONDS ), COOKIEPATH, COOKIE_DOMAIN );
	}

	if ( ! empty( $_GET['aff'] ) ) {
		setcookie( 'is_affcode', $_GET['aff'], time() + ( 30 * DAY_IN_SECONDS ), COOKIEPATH, COOKIE_DOMAIN );
	}

}

add_action( 'init', 'set_infusionsoft_tracking_cookie' );