Description:
------------
When I use function rename() to rename a folder by recursion.
But it doesn't work as usual.It renamed the file twice.

Reproduce code:
---------------
function addDomain($directory)
{
	if (is_dir($directory))
	{
		$dirHandle = opendir($directory);	
		
		while ($file = readdir($dirHandle))
		{
			if ($file != '.' && $file != '..')
			{
				if (is_dir($file))
				{	
					//do nothing;
				}
				else 
				{
					rename($directory.$file,$directory.$file.'r');
					echo $directory.$file.'<br>';
				}
			}
		}
		
		closedir($dirHandle);
	}
}

addDomain("test/");

Expected result:
----------------
test/Q4.php<br>test/Q5.php<br>

Actual result:
--------------
test/Q4.php<br>test/Q5.php<br>test/Q4.phpr<br>test/Q5.phpr<br>