Ajax post to php on same page not working

Question

I am trying to pass a var from jQuery to PHP.

After researching I found the most common suggestion was to do this with Post with Ajax and store the pos

Answer 1

Try

<script>
   $.ajax({
      type: "POST",
      url: "http://currentpage.com",
      data: {variablename:'value'},
      dataType: "text", //Available types xml, json, script, html, jsonp, text
      success:function(response){
       //Returned from server
       alert(response);
      }
    });
 </script>

Answer 2

<script>
   $.ajax({
      type: "POST",
      url: "index.php",
      data: {var:'value'},
      dataType: 'text',
      success:function(data){
       // Test what is returned from the server
         alert(data);
      }
    });
 </script>