问如何在Ajax调用中获取最新的csv文件？

EN

$.post( 'processor.php',
        $("#queryform :input").serializeArray(),
        function(data) {

                    d3.csv('diagrams/chord.csv', function (error, data) {
                    var mpr = chordMpr(data);

                    mpr
                      .addValuesToMap('chimp')
                      .setFilter(function (row, a, b) {
                        return (row.chimp === a.name && row.performedon === b.name)
                      })
                      .setAccessor(function (recs, a, b) {
                        if (!recs[0]) return 0;
                        return +recs[0].count;
                      });
                    sliderbanimate()
                    drawChords(mpr.getMatrix(), mpr.getMap());

                  });

            $chordquery = mysqli_query($connection, 'SELECT a.CName as CName, a.Performed_on as performed_on,Count(*) as Count
                                FROM behavior a WHERE 
                                BName IN ('.$behaviourarry.') GROUP BY CName, performed_on');       

                    $num = 0;

                    while($resultchord = mysqli_fetch_array($chordquery)) {

                        $rel[$num]['chimp'] = $resultchord['CName'];
                        $rel[$num]['performedon'] = $resultchord['performed_on'];
                        $rel[$num]['count'] = $resultchord['Count'];
                        $num++;
                        //$data2[] = $row3['CName'];
                        //echo $row3['CName']."-".$row3['performed_on']."-".$row3['BName']."-".$row3['Year']."-".$row3['Count']."<br/>";
                    }

                    $output = fopen("diagrams/chord.csv",'w') or die("Can't open php://output");
                    //header("Content-Type:application/csv"); 
                    //header("Content-Disposition:attachment;filename=pressurecsv.csv"); 
                    fputcsv($output, array('chimp','performedon','count'));
                    foreach($rel as $relation) {
                    fputcsv($output, $relation);
                    }
                    fclose($output) or die("Can't close php://output");