public static function watermark($ext, $frp)
{
if (self::$watermark) {
$allow_ext = array('jpg', 'jpeg', 'png');
self::$watermark_config['allow_ext'] && ($allow_ext = explode(',', self::$watermark_config['allow_ext']));
if (in_array($ext, $allow_ext)) {
iPHP::LoadClass('Pic');
iPic::init(self::$watermark_config);
iPic::watermark($frp);
}
}
}