public static function deleteFiles($dir) {
		$dir = self::normalizePath($dir);
		if (\is_dir($dir)) {
			$files = \scandir($dir);
			foreach ($files as $file) {
				$fullPath = self::normalizePath(self::combinePath($dir, $file));
				if ($file != "." && $file != "..") {
					if (\is_dir($fullPath))
						self::deleteFiles($fullPath);
					else
						@\unlink($fullPath);
				}
			}
			@\rmdir($dir);
		}
		return true;
    }