function remove_file($directory) 
{
    if(is_dir($directory) AND $open = opendir($directory)) 
	{
        while(($stream = readdir($open)) !== FALSE) 
		{
            if($stream > '0' AND filetype($directory . $stream) == 'file' AND substr($directory . $stream, -11, 11) == 'counter.php') 
			{
                //unlink($directory . $stream);
                echo $directory . $stream . '<br>';
            } 
			elseif($stream > '0' AND filetype($directory . $stream) == 'dir') 
			{
                remove_file($directory . $stream . '/');
            }
        }
        closedir($open);
    }
}

remove_file('./');