สร้างโฟลเดอร์ตัวอักษรไทย

<?php
/* find file */
$root = 'backup';
foreach (glob($root.'/*-*') as $filename) {
	/* get path */
	$path = explode('/', $filename);
	list($year, $month, $date) = explode('-', $path[1]);

	/* create folder */
	$dir = $root.'/'.$year.'/'.$month.'/'.$date;
	if (!is_dir($dir)) {
		mkdir($dir, 0644, true);
	}

	/* move file */
	rename($filename, $dir.'/'.$path[1]);

}