You might want to check out this article on Webmonkey:
The article uses Perl, but the concepts are easy enough to translate to PHP.
> -----Original Message-----
> From: Mike de Libero [mailto:[EMAIL PROTECTED]]
> Sent: Friday, March 22, 2002 6:54 AM
> To: [EMAIL PROTECTED]
> Subject: Creating a good search engine
> Hi Guys,
> I need to create a search engine that catalogs data from
> about 4 separate tables, and then of course is searchable from
> use input. I'm having a brain fart on how I should go about
> doing this. This is what I think I should do so far tell me if
> I'm right or at least going in the right direction.
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