$urllink = "<a href=\"".(substr(strtolower($url), 0, 4) == 'www.' ? "http://$url" : $url).'" target="_blank">';

$urllink = "<a href=\"".(substr(strtolower($url), 0, 4) == 'www.' ? "http://$url" : $url).'" target="_blank" rel="nofollow">';

$urllink = "<a href=\"".(substr(strtolower($url), 0, 4) == 'www.' ? "http://$url" : $url).'" target="_blank" style="color: red">';

function parseurl($url, $text) {
  if(!$url && preg_match("/((https?|ftp|gopher|news|telnet|rtsp|mms|callto|bctp|ed2k|thunder|synacast){1}:\/\/|www\.)[^\[\"']+/i", trim($text), $matches)) {
    $url = $matches[0];
    $length = 65;
    if(strlen($url) > $length) {
      $text = substr($url, 0, intval($length * 0.5)).' ... '.substr($url, - intval($length * 0.3));
    }
    return '<a href="'.(substr(strtolower($url), 0, 4) == 'www.' ? 'http://'.$url : $url).'" target="_blank" rel="nofollow">'.$text.'</a>';
  } else {
    $url = substr($url, 1);
    if(substr(strtolower($url), 0, 4) == 'www.') {
      $url = 'http://'.$url;
    }
    return '<a href="'.$url.'" target="_blank" rel="nofollow">'.$text.'</a>';
  }
}