File renaming error!

I wrote own php script to change wrong coding/charset

...
			foreach($files as $file){

				$path_parts = pathinfo($file);

				$file_replace = $path_parts['basename'];						

				if(mb_detect_encoding($file_replace, mb_detect_order(), true) == 'UTF-8'){

					$file_replace = iconv("UTF-8", "Windows-1250", $file_replace);

					$new_name = $path_parts['dirname'].DS.$file_replace;

					//rename($file, $new_name);
					copy($file, $new_name);
					unlink($file);

				};

//debug($file); debug($new_name); die();				

			}// endforeach file
...

It would be nice to have an option to change FILE NAME (if UTF8 – is special chars) to slug/url valid file name by ONE CLICK in WordPress panel.