rangking multisort

<?php
// mensimulasi data dari database, soalnya nggak tau tabel dan datanya sih...
$kritA=array(
        array("id_kriteria"=>1,"kriteria"=>"Pendidikan","nilai"=>100),
        array("id_kriteria"=>2,"kriteria"=>"Kelengkapan Dokumen","nilai"=>100),
        array("id_kriteria"=>3,"kriteria"=>"Pengalaman Kerja","nilai"=>100)
      );
$no_urutA=array(
          array("no_urut"=>1245,"nilai_1"=>2.43,"nilai_2"=>1.485,"nilai_3"=>1.07),
          array("no_urut"=>1246,"nilai_1"=>2.595,"nilai_2"=>1.8,"nilai_3"=>0.94),
          array("no_urut"=>1247,"nilai_1"=>2.185,"nilai_2"=>1.39,"nilai_3"=>1.25),
         );
function array_to_object($array) {
  $obj = new stdClass;
  foreach($array as $k => $v) {
    $obj->{$k} =(is_array($v))?array_to_object($v): $v;
  }
  return $obj;
}
// ini pura-puranya hasil dari query ke database-nya...
$krit=array_to_object($kritA);
$no_urut=array_to_object($no_urutA);
// preparing data to show
$no = 0;
$data_fix=array();
foreach($no_urut as $row1){
  $data_fix[$no]['no_urut']=$row1->no_urut;
  $jum = 0;
  foreach($krit as $row){
    $id = $row->id_kriteria;
    $nn = $row1->{"nilai_$id"};
    $nnn = $row->nilai/100*$nn;
    $data_fix[$no][$row->kriteria] = $nnn;
    $jum+=$nnn;
  }
  $data_fix[$no]['hasil_akhir'] = $jum;
  $hasil_akhir=array();
  foreach($data_fix as $key => $row6){
    $hasil_akhir[$key]=$row6['hasil_akhir'];
  }
  $no++;
}
array_multisort($hasil_akhir,SORT_DESC,$data_fix);
?>
<html>
 <head>
  <title>Array Multisort</title>
 </head>
<body>
<table border="1">
  <thead>
    <tr>
      <th>No. Urut Pelamar</th>
      <?php
        foreach($krit as $row){
          echo "<th scope='col'>$row->kriteria</th>";
        }
      ?>
      <th>Hasil Akhir</th>
      <th>Rangking</th>
    </tr>
  </thead>
  <tbody>
  <?php
  $rangking=1;
  foreach($data_fix as $key=>$val){
    echo "<tr>";
    foreach($val as $k=>$v){
      echo "<td>".$v."</td>";
    }
    echo "<td>$rangking</td></tr>\n";
    $rangking++;
  }
  ?>
  </tbody>
</table>
</body>
</html>