Pimcore\Image\Optimizer::optimizeAdvpng PHP Method

    public static function optimizeAdvpng($path)
    {
        $bin = \Pimcore\Tool\Console::getExecutable("advpng");
        if ($bin) {
            $newFile = self::getTempFile("png");
            copy($path, $newFile);
            Console::exec($bin . " -z4 " . $newFile, null, 60);
            return $newFile;
        }
        return null;
    }