How to convert keywords (from a .txt file) to URL links?

[Julian]

Hi Guys

I'm looking for a way I can convert keywords (from a .txt or whatever) to URL links.

e.g.  Like if I have "[color=red]computer[/color]" on the .txt file when the browser display this word on the page "[color=red]computer[/color]" will be a link to somewhere.

I've tried phpgiggle but it seems to be outdated and there's no support.

Any help will be highly appreciated.

[True`Logic]

$m = "" . include("file.txt");
$m = str_replace("computer", "<a href=\"www.computers.com\">computer</a>", $m);
echo $m;