web/public/teamtable/edit/update.php

<?php $app = require '../../../app/inc.php';
/**
 * Creates and updates team in teamtable
 */

use App\Teamtable\Team;

$item = filter_input(INPUT_GET, 'item', FILTER_VALIDATE_INT);

$model = $app->model('Teamtable');

if ($item !== NULL)
{
    $team = $model->get($item);
    if (!$team)
    {
        // team does not exist
        $app->session->flash('Kunne ikke oppdatere lag: Lag finnes ikke', 'danger');
        $app->redirect('index.php');
    }
}

if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
    $name         = filter_input(INPUT_POST, 'name');
    $company      = filter_input(INPUT_POST, 'company');
    $cardnumber   = filter_input(INPUT_POST, 'cardnumber');
    $leader       = filter_input(INPUT_POST, 'leader');
    $phone        = filter_input(INPUT_POST, 'phone', FILTER_VALIDATE_INT);
    $participants = filter_input(INPUT_POST, 'participants', FILTER_VALIDATE_INT);
    $rounds       = filter_input(INPUT_POST, 'rounds', FILTER_VALIDATE_INT);

    $team = new Team;
    try {
        $team->setName($name);
        $team->setCompany($company);
        $team->setCardnumber($cardnumber);
        $team->setLeader($leader);
        $team->setPhone($phone);
        $team->setParticipants($participants);
        $team->setRounds($rounds);
    } catch(InvalidArgumentException $e) {
        $app->session->flash('Kunne ikke oppdatere lag: Validerings feil: ' . $e->getMessage() , 'danger');
        $app->redirect('index.php');
    }

    if ($item !== NULL)
    {
        // team exists, lets update it
        $team->id = $item;
        $model->update($team);
        $app->session->flash('Oppdaterte lag', 'success');
        $app->redirect('index.php');
    }
    // no team was specified, lets create one
    $model->create($team);
    $app->session->flash('Opprettet nytt lag', 'success');
    $app->redirect('index.php');
}

if ($item !== NULL)
{
    // team exists
    $team = $model->get($item);

    $title = "Endre lag";
    $app->view('template/header', [
        'title' => $title
    ]);
    $app->view('pages/teamtable/edit/update', [
        "team" => $team,
        "title" => $title
    ]);
    $app->view('template/footer');
    die();
}

// lets create a team
$title = "Legg til lag";
$app->view('template/header', [
    'title' => $title
]);
$app->view('pages/teamtable/edit/update', [
    "team" => new Team,
    "title" => $title
]);
$app->view('template/footer');