Count Words in various file types

I have a need to count words in a php web app from uploaded files that can be in MS Word (.doc or .docx), pdf, txt or ppt (PowerPoint).

Does something exists that does this?

If not, how can I read these files from php?

Richard KortsBusiness Owner / Chief DeveloperAsked:
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Ray PaseurCommented:
You can definitely read the files.  Counting the words may have some technical hurdles.  For example you may need to "decode" the files in order to get a clear-text version of the documents.  I know this is possible because of sites like this:

OTOH, the advice on this page seems to be the easiest way to get started:

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Richard KortsBusiness Owner / Chief DeveloperAuthor Commented:

I also found this, which looks promising.

Ray PaseurCommented:
Yeah, David's usually pretty good.  IIRC the .docx files are really .doc files that have been zipped.  Might be worth pursuing that line of inquiry if you have .docx in the mix.
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