Communicating via COM in PHP is easy as ever; especially for people coming from a VB background where executing complex tasks in MS-applications is a piece of cake, you will feel right at home in PHP. In fact, VB COM calls can be converted to PHP COM calls in just a few simple search and replaces.

He shows how to use the COM extension in a (Windows) PHP installation to access the text inside the document and manipulate the contents however you'd like (even writing them back out to another Word file).

Lucene basically is an indexing and search technology, providing an easy-to-use API to create any type of application that has to do with indexing and searching. If you provide the right methods to extract data from any type of document, Lucene can index it. [...] Sounds like a challenge!

He works through the three step process to getting the searching working, the key being his readDocXContents() function that goes through the Word file and returns all the text it can find. This is passed back out so the Zend Framework component can pull the data in and search (their example is on the string "Code Access Security").

You can grab the the full code here.