Stripping HTML tags

[Florian Berger <fberger@...>]

Hi.

I thought that stripping HTML tags was easy until I saw something like 
this:
<a href="http://www.example.com"; alt="> example"> example </a>

My code was:
local s = '<a href="http://www.example.com"; alt="> example"> example </a>'
s = string.gsub(s, '<.->', ' ')
print(string.gsub(s, '<.->', ' '))

-> example"> example


I have seen some examples using PHP and regular expressions. Programming 
in Lua 20.1 says that Lua cannot do all what POSIX implementation does 
(http://www.lua.org/pil/20.1.html). Can this be done in Lua? All that come 
to my mind are captures but I'm not sure if they help at all.  Of course 
my example works in most of the cases, but it would be nice to have it 
work even better.

f