Shopping cart problem (it is not working on few computers)

[ymsweb]

Hi all,

We are having problems in the shopping cart created. It says "Shopping cart" is empty some pc's but on some pc's it is functioning properly. The shopping cart is working from my side but from client side (on client's pc's) it is some pc's working and some pc's not.

Here under I am giving the complete code that is functioning when clicking on the add to cart button. Can someone assist me better and tel me what actually is the problem inside the code.

I thanks to all of you.

Regds,
Yogendra

<?php include("admin/includes/session.php"); ?>
<?php include("checkextension.php"); ?>
<?php include("checkhttp.php"); ?>
<?php include("admin/includes/connection.php"); ?>
<?php
/*
 $invoiceQuery="select max(invoice_no) as invoice_no from cart";
     $invoiceQueryresult=mysql_query($invoiceQuery); 
     $row=mysql_fetch_array($invoiceQueryresult);
     $invoice_no=$row['invoice_no']+1;
     $updtQuery="update cart set invoice_no='".$invoice_no."' where rand_value='".$randnum."'";

*/
$session_id=session_id();
$today=date("Y-n-j H:i:s");
$ip_address=$_SERVER['REMOTE_ADDR'];
$rand_number=rand()."".rand()."".rand(5, 1000);
//echo $rand_number;
//know invoice number
$invoiceQuery="select *  from cart";
     $invoiceQueryresult=mysql_query($invoiceQuery); 
     $num=mysql_num_rows($invoiceQueryresult);
     if($num ==0)    
     {$invoice_no="1000";}
     else
     {
     $invoice_no="0";
     }
////////////////////
$product_id=@array_values($_POST['product_id']);
if ((count($product_id)>0))
{
$product_id=@implode(',',@array_values($_POST['product_id']));
}
$recommended_quantity=@array_values($_POST['recommended_quantity']);
if ((count($recommended_quantity)>0))
{
$recommended_quantity=@implode(',',@array_values($_POST['recommended_quantity']));
}
//echo "<br><br><br>Product IDs: ".$product_id."<br><br>";
//echo "Product Qtys: ".$recommended_quantity."<br><br>";
///// fetching the user email /////
      $result_user = mysql_query("select * from customers where email = '".$_SESSION['myusername']."'");
      while($row_user = mysql_fetch_array($result_user))
          {
          $user_id=$row_user['id'];
          $user_country_id=$row_user['country'];
          }
///////////////
?>
<?php
/////////////// Adding main product not recommended products ////////////////////
$pid=$_POST['pid'];
$product_color=$_POST['product_color'];
$measurement_size=$_POST['measurement_size'];
$quantity=$_POST['quantity'];
$result = mysql_query("SELECT * FROM product where id = ".$pid."");
while($row = mysql_fetch_array($result))
  {
  $unit_price=$row['unit_price'];
  $special_price=$row['special_price'];
  $discount_price=$row['discount_price'];    
                    if($special_price!=0.00)
                    {
                    $product_price=$special_price;
                    }
                    elseif($discount_price!=0.00)
                    {
                    $product_price=$discount_price;
                    }
                    else
                    {
                    $product_price=$unit_price;
                    }  
   $weight=$row['product_weight1'];    
   $total_weight=$weight*$quantity;
   $total_price=$product_price*$quantity;
  }  
$sql="insert into cart(user_id, product_id, unit_price, qty, weight, totalweight, product_color, measurement_size, subtotal, sess_id, ip_address, payment_status, rand_value, login_chk, invoice_no, is_wishlist, modified, created)VALUES('".$user_id."', '".$pid."', '".$product_price."', '".$quantity."', '".$weight."', '".$total_weight."', '".$product_color."', '".$measurement_size."', '".$total_price."', '".$session_id."', '".$ip_address."', '0', '".$rand_number."', '', '".$invoice_no."', 'No', '".$today."', '".$today."')";
$result=mysql_query($sql);
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

$productArray = explode(",", $product_id);
$qtyArray = explode(",", $recommended_quantity);
$i = 0;
foreach($productArray as $productid)
{
$result = mysql_query("SELECT * FROM product where id = ".$productid."");

while($row = mysql_fetch_array($result))
  {
  $unit_price=$row['unit_price'];
  $special_price=$row['special_price'];
  $discount_price=$row['discount_price'];    
                    if($special_price!=0.00)
                    {
                    $product_price=$special_price;
                    }
                    elseif($discount_price!=0.00)
                    {
                    $product_price=$discount_price;
                    }
                    else
                    {
                    $product_price=$unit_price;
                    }
  
   $weight=$row['product_weight1'];    
   $total_weight=$weight*$qtyArray[$i];
   $total_price=$product_price*$qtyArray[$i];
  }

if($qtyArray[$i] != 0)
{
$sql="insert into cart(user_id, product_id, unit_price, qty, weight, totalweight, subtotal, sess_id, ip_address, payment_status, rand_value, login_chk, invoice_no, is_wishlist, modified, created)VALUES('".$user_id."', '".$productid."', '".$product_price."', '".$qtyArray[$i]."', '".$weight."', '".$total_weight."', '".$total_price."', '".$session_id."', '".$ip_address."', '0', '".$rand_number."', '', '".$invoice_no."', 'No', '".$today."', '".$today."')";
$result=mysql_query($sql);
//echo "Name " . $nameArray[$i] . " shoud correspond with Email " . $email . "<br>";
}
else
{
echo "";
}

$i++;
}  
header("location:shopping-cart");
?>