How to make search engine index PDF files? [closed]

I’m looking for a plugin or a idea so that my WP 3.Best Answerearch engine can index PDF files. Has anyone be through that need too ?

Thanks !

The standard WordPress search is pretty basic and only search the database, there are some plugins that extend the search functionality to search even more parts of the database like:

• Search Everything
• Search Unleashed

but they do not have the ability to search files.
There is one plugin that i know of that claims to support indexing PDF and DOC files

• Sphider for WordPress
  which is a bit outdated and i have tried before so you might want to check it out.

But the best solution I have used for this kind of “Job” is Google custom search
that searchs PDFs and DOCs and is fairly easy to set up.