This module provide an efficent search index, also with pdf/doc files (require poppler-utils and wv). Optionally you can activate a PHP class for handling pdfs instead of poppler. Now supporting repeaters fields.
Processwire site Indexer v 0.8.3
Provide a simple site indexer for processwire pages.
- Now Supporting Page Fields
 - Support for Repeater Fields
 - Automatic text extraction from all fields.
 - Text extraction from .pdf and .doc files (will use poppler-utils and vw if available, but includes pure PHP classes for PDFs and various flavours of word processor docs, which may be sufficient).
 - English / Italian stopwords feature.
 
Install and use modules at your own risk. Always have a site and database backup before installing new modules.