Dynamic select options php and mysql

Question

I know this question have been asked many times, but I have tried for hours and nothing worked, I\'m a noob with php and ajax so, I might be missing a small thing that I\'m

Answer 1

$.ajax({
          url: 'process.php',
          type:'post',
          data: {parent: parent},
          success: function(data) {
              $("#ingredients").html(data);
          }
      }); 

in your process.php

$parent = $_POST['parent'];
echo($parent);