<?php session_start();

$products = array("Oranges", "apples", "tomatoes");
$amounts = array("19.99", "10.99", "2.99");

//Load up session
 if ( !isset($_SESSION["total"]) ) {
   $_SESSION["total"] = 0;
   for ($i=0; $i< count($products); $i++) {
   $_SESSION["amounts"][$i] = 0;
  }
 }

 //---------------------------

 //---------------------------
 //Add
 if ( isset($_GET["add"]) )
   {
   $i = $_GET["add"];
   $_SESSION["amounts"][$i] = $amounts[$i];
   $_SESSION["cart"][$i] = $i;
 }

 ?>

 <table>
   <tr>
   <th>Product</th>
   <th width="10px">&nbsp;</th>
   <th>Amount</th>
   <th width="10px">&nbsp;</th>
   <th>Action</th>
   </tr>
 <?php
 for ($i=0; $i< count($products); $i++) {
   ?>
   <tr>
   <td><?php echo($products[$i]); ?></td>
   <td width="10px">&nbsp;</td>
   <td><?php echo($amounts[$i]); ?></td>
   <td width="10px">&nbsp;</td>
   <td><a href="?add=<?php echo($i); ?>">Add to cart</a></td>
   </tr>
   <?php
 }
 ?>
 <tr>
 <td colspan="5"></td>
 </tr>
 </table>
 <?php
 if ( isset($_SESSION["cart"]) ) {
 ?>
 <br/><br/><br/>
 <h2>Cart</h2>
 <table>
 <tr>
 <th>Product</th>
 <th width="10px">&nbsp;</th>
 <th>Amount</th>
 <th width="10px">&nbsp;</th>
 <th>Action</th>
 </tr>
 <?php
 $total = 0;
 foreach ( $_SESSION["cart"] as $i ) {
 ?>
 <tr>
 <td><?php echo( $products[$_SESSION["cart"][$i]] ); ?></td>
 <td width="10px">&nbsp;</td>
 <td><?php echo( $_SESSION["amounts"][$i] ); ?></td>
 <td width="10px">&nbsp;</td>
 </tr>
 <?php
 $total = $total + $_SESSION["amounts"][$i];
 }
 $_SESSION["total"] = $total;
 ?>
 <tr>
 <td colspan="7">Total : <?php echo($total); ?></td>
 </tr>
 </table>
 <?php
 }
 ?>