Delete items from database in PHP

Question

<?php

if (empty($_GET['id'])) {
    header('Location: index.php');
    die();
}

require_once 'db.php';

$sql = 'DELETE FROM cars WHERE id = :id';

$stmt = $conn->prepare($sql);
$stmt->execute([
    ':id' => $_GET['id'],
]);

header('Location: index.php');

?>