web/public/teamtable/edit/delete.php

<?php
$app = require '../../../app/inc.php';

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

if (!isset($_GET['item']))
{
    $app->session->flash('Kunne ikke slette lag: ID ikke definert som GET parameter', 'danger');
    $app->redirect('index.php');
}
$id = $_GET['item'];

// ID must be numeric
if (!is_numeric($id))
{
    $app->session->flash('Kunne ikke slette lag: ID må være tall', 'danger');
    $app->redirect('index.php');
}

// Check if ID is in teamtable
$currentTeam = $model->getTeamByID($id);
if (!$currentTeam)
{
    $app->session->flash("Kunne ikke slette lag: ID $id finnes ikke", "danger");
    $app->redirect('index.php');
}

// Show confirmation page
if (isset($_GET['confirmation']) && $_GET['confirmation'] == 'true')
{
    $app->view('template/header', ['title' => 'Bekreft sletting']);
    $app->view('pages/teamtable/edit/delete', ['currentTeam' => $currentTeam]);
    $app->view('template/footer');
    die();
}

$model->deleteTeamByID($id);

$app->session->flash("Slettet lag: {$currentTeam['LagNavn']}", "success");

$app->redirect('index.php');