php traverses sub-files under a folder

function my_scandir($dir)
{
	$files=array();
	if(is_dir($dir))
	{
		if($handle=opendir($dir))
		{
			while(($file=readdir($handle))!==false)
			{
				if($file!=”.” && $file!=”..”)
				{
					if(is_dir($dir.”/”.$file))
					{
						$files[$file]=my_scandir($dir.”/”.$file);
					}
					else
					{
						$files[]=$dir.”/”.$file;
					}
				}
			}
			closedir($handle);
			return $files;
		}
	}
}

The above introduces PHP to traverse the sub-files under a folder, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.