Craft\ImagerService::_createTransformFilestring PHP Метод

    private function _createTransformFilestring($transform)
    {
        $r = '';
        foreach ($transform as $k => $v) {
            if ($k == 'effects' || $k == 'preEffects') {
                $effectString = '';
                foreach ($v as $eff => $param) {
                    $effectString .= '_' . $eff . '-' . (is_array($param) ? implode("-", $param) : $param);
                }
                $r .= '_' . (isset(ImagerService::$transformKeyTranslate[$k]) ? ImagerService::$transformKeyTranslate[$k] : $k) . $effectString;
            } else {
                if ($k == 'watermark') {
                    $watermarkString = '';
                    foreach ($v as $eff => $param) {
                        $watermarkString .= $eff . '-' . (is_array($param) ? implode("-", $param) : $param);
                    }
                    $r .= '_' . (isset(ImagerService::$transformKeyTranslate[$k]) ? ImagerService::$transformKeyTranslate[$k] : $k) . '_' . substr(md5($watermarkString), 0, 10);
                } elseif ($k == 'webpImagickOptions') {
                    $optString = '';
                    foreach ($v as $optK => $optV) {
                        $optString .= $optK . '-' . $optV . '-';
                    }
                    $r .= '_' . (isset(ImagerService::$transformKeyTranslate[$k]) ? ImagerService::$transformKeyTranslate[$k] : $k) . '_' . substr($optString, 0, strlen($optString) - 1);
                } else {
                    $r .= '_' . (isset(ImagerService::$transformKeyTranslate[$k]) ? ImagerService::$transformKeyTranslate[$k] : $k) . (is_array($v) ? implode("-", $v) : $v);
                }
            }
        }
        return str_replace(array('#', '(', ')'), '', str_replace(array(' ', '.'), '-', $r));
    }