PHP rename folders (or files) to lowercase

A fast way to rename folders (or files - with a small modification) to lowercase.

$usrfilespath = 'yourfolder/';
        if(is_dir($usrfilespath)) {
            $files = scandir($usrfilespath);
            foreach($files as $key=>$name){
                if($name !== '.' && $name !== '..' &&  is_dir($usrfilespath . '/' . $name)){
                rename( $usrfilespath . '/' . $name, $usrfilespath . '/' . strtoupper($name) );
                echo ( $usrfilespath . '/' . $name . '<br>' . $usrfilespath . '/' . strtolower($name) . '<br><br>' );
                }
            }
           
            $ToOutput .= 'OK: Folders renamed to lowercase<br>';
       
        } else {
            $ToOutput .= 'ERROR: No folders to rename<br>';
        }

echo $ToOutput