private static function checkUpfilePath()
{
self::$filepath = rtrim(self::$filepath, '/') . '/';
if (!file_exists(self::$filepath)) {
if (!mkdir(self::$filepath, 0755, TRUE)) {
self::error(-2);
return FALSE;
}
}
if (!is_writable(self::$filepath)) {
self::error(-1);
return FALSE;
}
return TRUE;
}