add to cart direct

    $params = array(
    //REQUIRED, the id of the event that needs to be added to the cart
    'event_id' => $event_id,
    //REQUIRED, Anchor of the link, can use text or image
    'anchor' => '<img src="http://breakwaterschoolregistration.org/wp-content/uploads/2013/12/addtocartbutton.jpg" />',
    //REQUIRED, if not available at this point, use the next line before this array declaration
    // $event_name = get_event_field('event_name', EVENTS_DETAIL_TABLE, ' WHERE id = ' . $event_id);
    'event_name' => $event_name,
    //OPTIONAL, will place this term before the link
    //'separator' => __("  ", 'event_espresso')
    'direct_to_cart' => 1,
);

$cart_link = event_espresso_cart_link($params);

echo isset($cart_link) ? $cart_link : '';