blank sidebox

[t0minit]

Hi

Im using the blank sidebox mod. I want to put this PHP into my sidebox and in one of my divs but i cant! Anyone have any ideas?

Cheers

<?php
    $header_cart = "<div id='header_cart'>"; 
  if ($_SESSION['cart']->count_contents() > 0) {
  $header_cart .= '<ul>' . "n";
    $products = $_SESSION['cart']->get_products();
    for ($i=0, $n=sizeof($products); $i<$n; $i++) {
      $header_cart .= '<li>';

      if (($_SESSION['new_products_id_in_cart']) && ($_SESSION['new_products_id_in_cart'] == $products[$i]['id'])) {
        $header_cart .= '<span class="cartNewItem">';
      } else {
        $header_cart .= '<span class="cartOldItem">';
      }

      $header_cart .= $products[$i]['quantity'] . BOX_SHOPPING_CART_DIVIDER . '</span><a class="font_green" href="' 

. zen_href_link(zen_get_info_page($products[$i]['id']), 'products_id=' . $products[$i]['id']) . '">';

      if (($_SESSION['new_products_id_in_cart']) && ($_SESSION['new_products_id_in_cart'] == $products[$i]['id'])) {
        $header_cart .= '<span class="cartNewItem">';
      } else {
        $header_cart .= '<span class="cartOldItem">';
      }

      $header_cart .= $products[$i]['name'] . '</span></a></li>' . "n";

      if (($_SESSION['new_products_id_in_cart']) && ($_SESSION['new_products_id_in_cart'] == $products[$i]['id'])) {
        $_SESSION['new_products_id_in_cart'] = '';
      }
    }
    $header_cart .= '</ul>' . "n";
  } else {
    $header_cart .= '<div id="cartBoxEmpty">' . BOX_SHOPPING_CART_EMPTY . '</div>';
  }

  if ($_SESSION['cart']->count_contents() > 0) {
    $header_cart .= '<hr />';
    $header_cart .= '<div class="cartBoxTotal">' . $currencies->format($_SESSION['cart']->show_total()) . '</div>';
//    $header_cart .= '<br class="clearBoth" />';
  }

$header_cart .= "</div>";
echo $header_cart;  ?>