function checkUnicodeCompliantBrowser() {
        global $wgBrowserBlackList;
        if( empty( $_SERVER["HTTP_USER_AGENT"] ) ) {
            // No User-Agent header sent? Trust it by default...
            return true;
        }
        $currentbrowser = $_SERVER["HTTP_USER_AGENT"];
        foreach ( $wgBrowserBlackList as $browser ) {
            if ( preg_match($browser, $currentbrowser) ) {
               
 return false;
            }
        }
        return true;
    }