Pass JS Variable to PHP

I called a Hook from the order received page and want to collect the JS data from user and pass it back to PHP to use the variable.

I tried to call with:

<script>
      jQuery.ajax({
      type: "POST",
      url: window.location,
      data: { test:"test" },
      success: function( data ) {
        alert(data);
      }
    });
</script>

and this to get

echo $_POST['test'];

but it is not working, the data is successfully posted but PHP cant read the variables.
Anybody know how to do it? Thanks for your help

• This topic was modified 4 years, 4 months ago by Steven Stern (sterndata).