reading odt files in php

odt, files are zip compressed xml.

If all you need to do is read the file raw. Just unzip it and read it like a normal file.

If you need to parse out usable text, then enters the need for QueryPath or some other xslt parser.

OpenTBS is able to read and modify OpenDocument files in PHP.

Since OpenDocument files are XML files stored into a zip archive, you can also use the TbsZip class to simply read a zip archive under PHP without any other library dependency.