if (isset($_POST['home'])) {
    $today = date("Y-m-d");
    $me = $_SESSION['user_id'];
    $query = "SELECT * FROM umowy WHERE wynajmujacy='$me'";
    $results = mysqli_query($db, $query);

    while ($row = $results->fetch_assoc()) {
      $rows = $row;
    }
    foreach ($rows as $key => $value) {
      $var = $key." ".$value;
      array_push($allerts, $var);
    }