1. $('#locality_input').autocomplete({
      source: function(request, response) {
       $.ajax({
        url: 'php/csvtoarray.php',
        dataType: 'json',
        data: {
         state: $('#state').val(),
         q: request.term
        },
        success: function(data) {
         response($.map(data, function(item) {
          return {
           label: item.locality + ', ' + item.postcode + ', ' + item.state,
           value: item.label,
           postcode: item.postcode,
           locality: item.locality
          }
         }));
        }
       })
      },
      select: function(event, ui) {  
       $('#location_postcode').val(ui.item.postcode);
       $('#location_label').val(ui.item.label);
       $('#location_locality').val(ui.item.locality);
      },
      minLength: 3
    });
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

It will return values like this: