I'm sending the variable like this:

```
xmlhttp.open("GET","insert-karma.php?pid=<? echo $pid; ?>",true);

```

The AJAX part doesn't seem to be the problem, if I check the Sript the PHP is echoing the integer correctly. (It displays the url as: `insert-karma.php?pid=5`). However the PHP isn't getting the variable. (I tried echoing and it does't show anthing)

This is the PHP file:

```
// Connect to db;

$pid = $_POST['pid'];

$sql="UPDATE Poems SET Karma = Karma + 1 WHERE Pid = '$pid'";

// Disconnect form database;

```

What am I doing wrong? How do I manage to send `$pid` to the PHP update-karma.php?