利用PHP内置dir类实现目录遍历显示

php代码

function listDir( $dir )
{
	$dirObj = dir($dir);
	$ul = "";
	
	while ($file = $dirObj->read())
	{
		if ( is_dir($dir .'/'. $file) )
		{
			$ul .= "" .$file. "";
			$ul .= listDir( $dir .'/'. $file );
		}
		else	$ul .= "{$file}";
	}
	$ul .= "";
	$dirObj->close();
	return $ul;
}

echo listDir('./demo');