winframework / winphp

    {

        preg_match_all('/(src|background)=["\'](.*)["\']/Ui', $message, $images);

        if (array_key_exists(2, $images)) {

            if (strlen($basedir) > 1 && substr($basedir, -1) != '/') {

                // Ensure $basedir has a trailing /

                $basedir .= '/';

            }

            foreach ($images[2] as $imgindex => $url) {

                // Convert data URIs into embedded images

                //e.g. "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="

                        $directory = '';

                    }

                    $cid = hash('sha256', $url) . '@phpmailer.0'; // RFC2392 S 2

                    if (strlen($basedir) > 1 and substr($basedir, -1) != '/') {

                        $basedir .= '/';

                    }

                    if (strlen($directory) > 1 and substr($directory, -1) != '/') {

                        $directory .= '/';

                    }