Question

I’m building a search function to retrieve XML data for a google map.

In addition to that, I want to display how many results were actually found.

I thought about doing an echo inside the actual document, however that might mess with my marker data. How would I take a PHP variable and retrieve it in Jquery after a success call?

If my PHP looked like this:

$result = mysql_query($query);
if (!$result) {
  die('Invalid query: ' . mysql_error());
}
$num_rows = mysql_num_rows($result);

And Jquery like this:

    $.ajax({
        type: "POST",
        url: "MapSearchxml.php",
        data: {
            dataFromDate: FromDate,
            //lalala
            dataHasPatio: HasPatio
        },
        beforeSend: function (html) { // this happens before actual call
            $("#results").html('Please Wait');
            $("#searchresults").show();
            $(".phpFromDate").html(FromDate);
        },
        success: function (data, status, jqXHR) {

        //Success?
        },
        dataType: 'xml'
    });

Answer 1

Might find it easier to create array in php and send JSON. At client is easy to loop over response object/array

$output=array('status'=>'', 'results'=>array());
$result = mysql_query($query);
if (!$result) {
  die('Invalid query: ' . mysql_error());
}
$num_rows = mysql_num_rows($result);

if( $num_rows){ 
  $output['status']='ok';
  /* push row data to $output['results'][]; in while loop*/
}else{
  $output['status']= 'No results';
}

echo json_encode( $output);

Then in jQuery:

success:function( data){
  if (data.status != 'No results' ){
      /* count array length*/
      var count= data.results.length;
      /* loop over data.results array*/
  }
}

/* change dataType to "json"*/

I forgot about count and added it in jQuery…can also add a count property to the $output php array and use $num_rows to populate