PHP scan directory

function searchdir ( $path , $maxdepth = -1 , $mode = "FULL" , $d = 0 )
{
	if ( substr ( $path , strlen ( $path ) - 1 ) != '/' )
	{
		$path .= '/';
	}     
	$dirlist = array () ;
	if ( $mode != "FILES" ) {
		$dirlist[] = $path;
	}
	if ( $handle = opendir ( $path ) )
	{
		while ( false !== ( $file = readdir ( $handle ) ) )
		{
			if ( $file != '.' && $file != '..' )
			{
				$file = $path . $file ;
				if ( ! is_dir ( $file ) )
				{
					if ( $mode != "DIRS" )
					{
						$dirlist[] = $file;
					}
				}
				elseif ( $d >=0 && ($d < $maxdepth || $maxdepth < 0) )
				{
					$result = searchdir ( $file . '/' , $maxdepth , $mode , $d + 1 ) ;
					$dirlist = array_merge ( $dirlist , $result ) ;
				}
			}
		}
		closedir ( $handle ) ;
	}
	if ( $d == 0 ) { natcasesort ( $dirlist ) ; }
	return ( $dirlist ) ;
}