PHP Shopping cart issue

Hi there,

I'm having an issue with my code and I cannot for the life of me figure out what I'm doing wrong.

The best way is probably to just show you and provide a list, so here is a link to the test site:
http://uberdelic.com/abtest/index.php

And here's your list:

• When I add an item to the cart everything works fine apart from the item number is 0
  
• If i add another item, the new items number is also 0, next is 1, 2, 3 and so on.
• Now if i try and empty the cart, it does nothing....but click twice and the cart empties?

And I'll paste my cart.php code below. Thankyou to anyone who actually looks through this, cos it's a mess and as it's not an easy one, or at least I haven't found it to be.... encouraging huh?

<?php
session_start();
include 'header.php';
?>
<div id="uber-body">
    <h1>My cart</h1>
    <?php
    ///This section is for pulling the cart id and +1
    if(isset($_POST['pid'])){
            $pid = $_POST['pid'];
            $wasFound = false;
            $i = 0;
            if(!isset($_SESSION["cart_array"])||count($_SESSION['cart_array'])<1){
                $_SESSION["cart_array"]=array(0 => array("id" => $pid, "quantity" => 1));
            }else{
                foreach($_SESSION["cart_array"] as $each_item){
                        $i++;
                            while(list($key,$value)=each($each_item)){
                                    if($key == "id"&&$value==$pid){
                                            array_splice($_SESSION['cart_array'],$i-1,1, array(array("id" => $pid, "quantity" => $each_item['quantity']+1)));
                                            $wasFound=true;
                                    }
                            }
                    }
                    if($wasFound == false){
                    array_push($_SESSION["cart_array"], array("id"=>$pid,"quantity" => 1));  
                    }
            }
    }
    ?>
             <div id="cart-products">
               <a href="#bottomview"></a>
   
    <?php
    //Render the cart
    $cartOutput="";
    $cartTotal="";
    $pp_checkout_btn="";
    $product_id_array="";
        if(!isset($_SESSION["cart_array"])||count($_SESSION['cart_array'])<1){
            $cartOutput="<h3 align='center'>your cart is empty</h3>";
            }else{
                $pp_checkout_btn.='<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
                <input type="hidden" name="cmd" value="_cart">
                <input type="hidden" name="upload" value="1">
                <input type="hidden" name="business" value="uberdelic@gmail.com">';
                $i=0;
                foreach($_SESSION["cart_array"] as $each_item){
                    $id =  $each_item['id'];
                    $prod_name =  $each_item['prod_name'];
                    $prod_price =  $each_item['prod_price'];
                    $prod_short =  $each_item['prod_short'];
                    $prod_delivery =  $each_item['prod_delivery'];
                    $prod_sku =  $each_item['prod_price'];
                    $prod_img =  $each_item['prod_img'];
                  
                    $result = $db_conx->query("SELECT * FROM wallhangings WHERE id='$id' ");
                    while($rows = $result->fetch_array()) {
                        $prod_id=$rows["id"];
                        $prod_name=$rows["prod_name"];
                        $prod_short=$rows["prod_short"];
                        $prod_price = $rows["prod_price"];
                        $prod_img = $rows["prod_img"];
                        $prod_delivery = $rows["prod_delivery"];
                        $prod_sku = $rows["prod_sku"];
                        $producttotal=$rows["prod_price"]+$rows["prod_delivery"];
                        $subtotal=$prod_price*$each_item['quantity'];
                        $subsubtotal=$prod_delivery*$each_item['quantity'];
                        $pricetotal=$subtotal+$subsubtotal;
                        $x=$i+1;
                        $pp_checkout_btn.='<input type="hidden" name="item_name_'.$x.'" value="'.$prod_name.'">
                                            <input type="hidden" name="amount_'.$x.'" value="'.$producttotal.'">
                                            <input type="hidden" name="on0" value="'.$prod_sku.'">
                                            <input type="hidden" name="quantity_'.$x.'" value="'.$each_item['quantity'].'">';
                        $product_id_array.="$prod_id-".$each_item['quantity'].",";
  
                    }  
                    $cartTotal = $pricetotal+$cartTotal;
                              
                    $cartOutput.="<div class='cart_prod'><strong>ITEM $i</strong>";
                    //$cartOutput.= "item id".$each_item['id']."<br />";
                    $cartOutput.= "<div class='cartimg'><img src='".$prod_img."'/></div><br />";
                    $cartOutput.= "product name:<h4 class='prod'><br />".$prod_name."</h4></p>";
                    $cartOutput.= "discription: ".$prod_short."<br />";
                    $cartOutput.= "price(per item:) &pound;".$prod_price."<br />";
                    $cartOutput.= "quantity: ".$each_item['quantity']."<br />";
                    $cartOutput.= "delivery charge: &pound;".$prod_delivery."<br />";
                    $cartOutput.= "product sku: ".$prod_sku."<br />";
                    $cartOutput.= "total price: &pound;".$pricetotal."<br />";
                    $cartOutput.= '<form class="prod_del" action="cart.php#bottomview" method="post">
                                     <input name="index_to_remove" type="hidden" value="'. $i .'"/>
                                        <input name="deletebtn'.$id.'" type="submit" value="delete"/>
                                   </form></div>';
                    //while(list($key,$value)=each($each_item)){
                    //    $cartOutput.="$key:$value<br />";
                    $i++;
                    echo $cartOutput;
                                  
            }
            $pp_checkout_btn.='<input type="hidden" name="custom" value=".$product_id_array.">
            <input type="hidden" name="notify_url" value="http://www.uberdelic.com/new/storescripts/my_ipn.php">
                                <input type="hidden" name="return" value="http://www.uberdelic.com/new/checkout_complete.php">
                                <input type="hidden" name="rm" value="2">
                                <input type="hidden" name="cbt" value="return to the store">
                                <input type="hidden" name="cancel_return" value="http://www.uberdelic.com/new/paypal_cancels.php">
                                <input type="hidden" name="lc" value="GB">
                                <input type="hidden" name="currency_code" value="GBP">
                                <input class="paypal_btn" type="image" src="https://www.paypal.com/en_US/i/btn/btn_paynowCC_LG.gif" name="submit" alt="Make payments with PayPal - it\'s fast, free and secure!">                            </form>';
        }
    ?>
  
    <?php
    // if item removed
    if(isset($_POST['index_to_remove'])&&$_POST['index_to_remove']!=""){
        $key_to_remove = $_POST['index_to_remove'];
            if(count($_SESSION["cart_array"])<=1){
                unset($_SESSION["cart_array"]);
            }else{
                unset($_SESSION["cart_array"]["$key_to_remove"]);
                sort($_SESSION['cart_array']);
            }
    }
    ?>
  
    <?php
    ///This section is for emptying the ubercart
    if(isset($_GET['cmd'])&&$_GET['cmd']=="emptycart"){
        unset($_SESSION["cart_array"]);
    }
    ?>
    </div>
<div id="paynow">
            <p class="center">
                <strong>
                    Total: &pound;<?php echo $cartTotal; ?>
                </strong>
            </p>
            <?php echo $pp_checkout_btn; ?>
            <p class="center">
                <a href="cart.php?cmd=emptycart#bottomview">
                    Click here to empty your cart
                 </a>
             </p>
<div class="clear"></div>
</div>

</div>

<?php    include 'footer.php'?>

Code (markup):