Is it possible to extract Meta information from MS office files and/or PDFs with PHP?

[court-circuit]

So I have files....\[code\].doc.docx.xls.xlsxand .pdf\[/code\]that are on the my server. Is it possible (and if it is, how) to extract the meta data from those files using PHP?I'm looking for things like Author, keywords, title, etc...In office documents it's the information stored along with the document properties (File...Properties...Summary for 2003, Prepare...Properties for 2007).In PDFs it's information found in Document Properties.This is not on a Windows server.