Yii：我如何链接某些文本中的所有网址？

Say I have a forum thread and I want to make all mentioned URLs as clickable links. How can I accomplish this in Yii?

Thanks.

Did you look into CHtmlPurifier? see: Linkify and http://htmlpurifier.org/demo.php

This is copied straight from this stackoverflow question

$text = preg_replace("
  #((http|https|ftp)://(\S*?\.\S*?))(\s|\;|\)|\]|\[|\{|\}|,|\"|'|:|\<|$|\.\s)#ie",
  "'<a href=\"$1\" target=\"_blank\">$3</a>$4'",
  $text
);