<?
ob_start();
session_start();

if($_SESSION['MNo'] <> "") {    //check login

if(!isset($_SESSION["intLine"]))
{

$_SESSION["intLine"] = 0;
$_SESSION["strProductID"][0] = $_GET["PNo"];
$_SESSION["strQty"][0] = 1;

header("location:show.php");
}
else
{

$key = array_search($_GET["PNo"], $_SESSION["strProductID"]);
if((string)$key != "")
{
$_SESSION["strQty"][$key] = $_SESSION["strQty"][$key] + 1;
}
else
{

$_SESSION["intLine"] = $_SESSION["intLine"] + 1;
$intNewLine = $_SESSION["intLine"];
$_SESSION["strProductID"][$intNewLine] = $_GET["PNo"];
$_SESSION["strQty"][$intNewLine] = 1;
}

header("location:show.php");

}
}else{
  
echo("<script> alert('Please Login !');</script>");
echo "<meta http-equiv='refresh' content='0;url= index.php'>";
  
}
?>