Hi,
the hard part is not the PHP, which would only unpack the docx as a zip.
The hard part is the XSLT
There are some tricky bits in there
- the equations which require transformation to some mathml form
- the docx are completely style-less, so there needs to be some logic
I am a top expert XSLT, full time professional freelancer. I have done a number of docx related projects in the past, so I very well know how hard that can get. Full satisfaction guaranteed
If I can make a suggestion... if you don't need integration in PHP but could deal with a commandline process, then you could use XSLT2, saxonHE which would make XSLT development easier (so cheaper)
Looking forward to help
Geert