/** * @return string */ public static function ConvertSystemString($sSrt) { if (!empty($sSrt) && !\MailSo\Base\Utils::IsUtf8($sSrt)) { $sCharset = \MailSo\Base\Utils::DetectSystemCharset(); if (!empty($sCharset)) { $sSrt = \MailSo\Base\Utils::ConvertEncoding($sSrt, $sCharset, \MailSo\Base\Enumerations\Charset::UTF_8); } else { $sSrt = @\utf8_encode($sSrt); } } return $sSrt; }