1 - folder2array()
function folder2array($path=''){
		//$path=empty($path)?'./':$path;
		$array=[];
		$current_dir=glob($path.'/*');
		if ($current_dir[0]==$path) unset($current_dir[0]);
		foreach ($current_dir as $key => $item) {
			if (is_file($item)){
				$array[]=$item;
			}else{
				$array[]=folder2array($item);
			}
		}
		return $array;
	}