Add Item and stay in current page

I have this code to prosses the ADD TO CART button:

if (isset($_POST['pid'])) {
$pid = $_POST['pid'];
$wasFound = false;
$i = 0;
// If the cart session variable is not set or cart array is empty
if (!isset($_SESSION["cart_array"]) || count($_SESSION["cart_array"]) < 1) {
    // RUN IF THE CART IS EMPTY OR NOT SET
    $_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 == $pid) {
                  // That item is in cart already so let's adjust its quantity using array_splice()
                  array_splice($_SESSION["cart_array"], $i-1, 1, array(array("item_id" => $pid, "quantity" => $each_item['quantity'] + 1)));
                  $wasFound = true;
              } // close if condition
          } // close while loop
       } // close foreach loop
       if ($wasFound == false) {
           array_push($_SESSION["cart_array"], array("item_id" => $pid, "quantity" => 1));
       }
}
exit();
}

And my add button:

<form id="bd_itm1" name="bd_itm1" method="post" action="help_scripts/cart_functions.php">
      <input type="hidden" name="pid" id="pid" value="'. $id . '" />
      <input type="submit" name="button" id="button" value="Add to Cart" />
</form>

When I click it it takes me to the cart.php as I tell it to do with my header(location). But I do not want it to. I want to stay at the same page as my ad button. Now, if I remove my header(location) it takes me to a blank page. (but still it adds the item to cart) No errors in my logs. FOR SURE. :)

Many are saying things about ajax and jquery... but I am not that familiar with these!

Thank you

My dynamicList code: (I don't know what's happening but just now it showed me your question)

$sql = mysql_query("SELECT * FROM products WHERE category='body' ORDER BY id ASC");
$productCount = mysql_num_rows($sql);
// count the output amount
if ($productCount > 0) {
        $i=0;
        $dynamicListBody = '<table width: 90%; margin-right: auto; margin-left: auto; color: #00E6AA;>';
        while($row = mysql_fetch_array($sql)){
            $id = $row["id"];
            $product_name = $row["product_name"];
            $details = $row["details"];
            $price = $row["price"];
            $date_added = strftime("%b %d, %Y", strtotime($row["date_added"]));
        $dynamicListBody .= ($i==0) ? '<tr>':'';
        $dynamicListBody .= '<td width="10%">
                    <img style="border:#666 1px solid;" src="../stock_photos/' . $id . '.png" height="80px" width="40px" alt="' . $product_name . '" />
                     </td>
                     <td width="35%">
                    <span class=itmttl>' . $product_name . '</sp开发者_如何学运维an>
                    <br />
                    <span class=text>' . $details . '
                    <br />
                    €' . $price . '</span>
                    <br />
                      <form name="bd_itm" id="bd_itm" method="post" action="help_scripts/cart_functions.php">
                    <input type="hidden" name="pid" id="pid" value="' . $id . '" />
                    <input type="submit" name="button' . $id . '" id="button' . $id . '" value="Add to Cart" />
                    <br />
                    <br />
                      </form>
                     </td>';
        $dynamicListBody .= ($i==1) ? '</tr>':'';
        $i++;
        ($i==2) ? $i=0:'';
        }
        $dynamicListBody.='</table>';
        } else {
            $dynamicListBody = "We have no products listed in our store yet";
            }
        mysql_close();
?>

If you don't mind the page refreshing after the POST from your button you could add a redirect in your php code to bring you back to the page the button is on.

header('Location: http://domain.com/button/page.php');
exit();

You'll have to use AJAX if you want the page not to refresh.

with jquery:

$(':submit').click(function() {
    var keyValues = {
        pid : $(this).parent().find('input[name="pid"]').val()
    };
    $.post('help_scripts/cart_functions.php', keyValues, function(rsp) {
        // make your php script return some xml or json that gives the result
        // rsp will be the response
    });
    return false; // so the page doesn't POST
});

put the above javascript in a .js file that is loaded with your button page.

You may want to make this change in your php that runs when the button is pressed:

$_SESSION["cart_array"] = array(0 => array("item_id" => $pid, "quantity" => 1));

Change the above to

$_SESSION["cart_array"] = array("item_id" => $pid, "quantity" => 1);

this is the code that runs if the cart array is not set or is empty