ดูให้หน่อย คับ เกี่ยวกับตาราง Cart คับ บรรทัดแรก มัน เน่า

<?
session_start(); // Start session first thing in script
error_reporting(E_ALL);
ini_set('display_errors', '1');
include "storescript/connect_to_mysql.php";
?>
<?php 
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("item id" => $pid, "quantity" => 1));
} else {
	// RUN IF THE CART HAS AT LEAST ONE ITEM IN IT
	foreach ($_SESSION["cart_array"] as $each_item){
		$i++;
		while (list($key, $value) = each($each_item)){
			if ($key == "item_id" && $value == $pid){
				// That item is in cart already so lets adjust its quantity using array_splice()
				array_splice($_SESSION["cart_array"], $i-1, 1, array(array("item_id" => $pid, "quantity" => $each_item['quantity'] + 1)));
				$wasFound = true;
			}
	 	 }
	  }
	  if ($wasFound == false){
		  array_push($_SESSION["cart_array"], array("item_id" => $pid, "quantity" => 1));
	  }
  }
}
?>
<?php 
if (isset($_GET['cmd']) && $_GET['cmd'] == "emptycart"){
	unset($_SESSION["cart_array"]);
}
?>
<?php 
$cartOutput = "";
if (!isset($_SESSION["cart_array"]) || count($_SESSION["cart_array"]) < 1){
	$cartOutput = "<h2 align='center'>Your shopping cart is empty</h2>";
} else {
	$i = 0;
	foreach ($_SESSION["cart_array"] as $each_item){
		$i++;
		$item_id = $each_item['item_id'];
		$sql = mysql_query("SELECT * FROM products WHERE id='$item_id' LIMIT 1");
		while($row = mysql_fetch_array($sql)) {
			$product_name = $row["product_name"];
			$price = $row["price"];
			$details = $row["details"];
		}
		$pricetotal = $price * $each_item['quantity'];
		// td row
		$cartOutput .= "<tr>";
		$cartOutput .= "<td>". $product_name . "</td>";
		$cartOutput .= "<td>". $details . "</td>";
		$cartOutput .= "<td>". $price . "</td>";
		$cartOutput .= "<td>". $each_item['quantity'] . "</td>";
		$cartOutput .= "<td>". $pricetotal . "</td>";
		$cartOutput .= "<td>X</td>";
		$cartOutput .= "</tr>";
	}
}
?>