function delete folder

function deleteFolder($folder_id)
{
    global $pdo;
    $sql = "DELETE FROM folders WHERE id = $folder_id ;";
    $stmt = $pdo->prepare($sql);
    $stmt->execute();
    return $stmt->rowCount();
}																											

delete folder condition

if (isset($_GET['delete_folder']) && is_numeric($_GET['delete_folder'])) {
    $deletedCount = deleteFolder($_GET['delete_folder']);
    echo "$deletedCount folders succesfully";
}