How to update quantity in session array on the go? - php

Question

I want to capture value keyed in textbox for quantity in the shopping cart while they type. I used jquery's key up for this.Then I want to save the new value in the session for quantity. I'm getting the value but unable to save it. It returns null after refreshing the page.
Html
<input type="text" size="4" class="qty" value="<?php echo $v['quantity'];?>" id="<?php echo $k;?>"/>
Ajax
$("input[class=qty]").keyup(function()
{
var data;
var newVal = $(this).val();
var id = this.id;
console.log(id+" "+newVal);
$.ajax({
type: "GET",
dataType: "text",
url: "updateCart.php?id="+id+"&&value"+newVal, //Relative or absolute path to response.php file
data: data,
success: function(data) {
console.log(data);
newVal=data;
}
});
});
updateCart.php
<?php
session_start();
$id = $_GET['id'];//say 2
$new_value =$_GET['value'];//say 16
foreach($_SESSION['cart'] as $k=>$v)
{
$k;
$v["id"];
$v["quantity"];
if($id == $k)
{
//assign new value to the quantity
$_SESSION['cart'][$id]['quantity']=$new_value;
//print_r($_SESSION['cart'][1]['quantity']);
}
}
//echo json_encode($new_value);
//var_dump($_SESSION['cart']);
this can display session['cart'] with updated value if I test in
this page ..but when passed to originated page via ajax, returns null.
echo $_SESSION['cart'][$id]['quantity'];
?>

Answer 1

You left out the = between &value and + newVal. But I recommend you let jQuery do this automatically by using the data: option.
data = { id: id, value: newVal };
$.ajax({
type: "GET",
dataType: "text",
url: "updateCart.php", //Relative or absolute path to response.php file
data: data,
success: function(data) {
console.log(data);
newVal=data;
}
});