How to create search function on 100+ PDFs that are in a DVD

You should read this page over to understand why it's hard working with PDF files. Be sure to check out the links at the bottom for various software.

Here's a Google open source OCR piece of software you may be able to utilize.

Here's another thread where someone asked the same question essentially. One of the links provided and mention of some PHP libraries may be of help.

This looks to be an interesting site as well. It'll require a more technological mind though (than other solutions).

 

This is built into Acrobat. What you need to do is build a full-text index for the entire document base.

Searching this way (note that this is not the standard find but the Advanced search) will return a search-engine like page of results. You'll want to look under "Catalog" in the on-line help.

In Acrobat 9 this is under Advanced->Document Processing->Full text index with catalog. You may want to build a PDF as a "start page" for the whole system.