usortで安定ソート

$data = [
    ['name'=>'Arai', 'score'=>30],
    ['name'=>'Inoue', 'score'=>40],
    ['name'=>'Utada', 'score'=>30],
    ['name'=>'Okuda', 'score'=>40],
    ['name'=>'Kato', 'score'=>23]
    ];

    // record
    for ($i = 0; $i < count($data); i++){
        $data[$i]["id"] = $i + 1;
    }
    usort($data, function($a, $b){
          if ($a['score'] == $b['score']){
          return ($a['id'] > $b['id']) ? 1 : -1;
          });
    foreach ($data as $u){
    echo $u['id'].":".$u['name'].":".$u['score']."\n";
    }