A query processor class that extract words from hard disk files, creates a inverted index with words found, calculates their positions and count ocurrences.

I created an example using a set of HTML files with portuguese text, the example basically has a form for write words sequence. After search the file list with words or terms, you can see a file list matched and access them.

More about inverted index at: Inverted Index

For running the example put 'example' directory at web server, open file 'index.php' and alter variables: $FOLDER_PATH and $INVERTED_INDEX_PATH.