Table Specialty (backend)

<?php

require_once "db-unity/db.php";

$specialty = $_POST['specialty'];
//$specialty = "Информатика"; // Example
$users = R::findAll("users");

$array = [];
$score = [];
$j = 0;

foreach ($users as $user) {

    if($user->specialty_1 == $specialty) {
        $array[$j] = $user;
        $score[$j] = 1;
        $j+=1;
    }
    else if ($user->specialty_2 == $specialty) {
        $array[$j] = $user;
        $score[$j] = 2;
        $j+=1;
    }
    else if ($user->specialty_3 == $specialty) {
        $array[$j] = $user;
        $score[$j] = 3;
        $j+=1;
    }
}

$output = "<h3>" . $specialty . "</h3><br>";
$output .= " <table>
        <thead>
          <tr>
              <th>Фамилия</th>
              <th>Имя</th>
              <th>Отчество</th>
              <th>Рейтинговый балл</th>
              <th>Приоритет</th>
          </tr>
        </thead>
        <tbody>";

$rightArray = [];

for ($i = 0; $i < $j; $i += 1) {
    $zno_score = "";
    $priority = "";
    if($score[$i] == 1)
        $zno_score .= $array[$i]->zno_competition_score_1;
    else if($score[$i] == 2)
        $zno_score .= $array[$i]->zno_competition_score_2;
    else if($score[$i] == 3)
        $zno_score .= $array[$i]->zno_competition_score_3;

    if($score[$i] == 1)
        $priority .= $array[$i]->priority_1;
    else if($score[$i] == 2)
        $priority .= $array[$i]->priority_2;
    else if($score[$i] == 3)
        $priority .= $array[$i]->priority_3;

    $rightArray[$i] = array(
        'surname'  => $array[$i]->surname,
        'name' => $array[$i]->name,
        'middlename' =>  $array[$i]->middlename,
        'zno_score'  => $zno_score,
        'priority' => $priority
        );
}

for ($i=0; $i < count($rightArray); $i++) {
    $sortkey[$i]=$rightArray[$i]['zno_score'];
}

arsort($sortkey); // по возрастанию, arsort($sortkey) - по убыванию

foreach ($sortkey as $key => $key) {
    $sorted[]=$rightArray[$key];
}

for ($i = 0; $i < $j; $i += 1) {
    $output .=
        "<tr>
            <td>" . $sorted[$i]['surname'] . "</td>
            <td>" . $sorted[$i]['name'] . "</td>
            <td>" . $sorted[$i]['middlename'] . "</td>
            <td>" . $sorted[$i]['zno_score']. "</td>
            <td>" . $sorted[$i]['priority'] . "</td>
        </tr>";
}

$output .= "</tbody>
      </table>";

echo $output;
?>