get filename n extention CI

$path = base_url()."/uploads/images/berita_compro/img_1.png";
$ext = pathinfo($path, PATHINFO_EXTENSION);
echo "<img src='".base_url()."\uploads\images\berita_compro\img_1.png'><br />";
$filename = basename($path, ".".$ext);
echo $filename."_".date('YmdHis').".".$ext; // img_1_20191028140219.png