public function listadopre($page = null)
{
$total = Obra::all();
if ($page) {
$final['total'] = count($total);
$pages = ceil(count($total) / 10);
$total = array_slice($total, 10 * ($page - 1), 10);
$final['pages'] = $pages;
$final['data'] = $total;
$final['currentPage'] = (int) $page;
} else {
$final['total'] = count($total);
$final['data'] = $total;
}
echo '<pre>';
echo json_encode($final);
echo '</pre>';
}
