We currently have a self made php class to convert a HTML string into a .doc file using mhtml. This works fine, but our customers would like to be able to export to .docx instead of .doc, which proves to be a bit challenging.

We currently have a self made php class to convert a HTML string into a .doc file using mhtml. This works fine, but our customers would like to be able to export to .docx instead of .doc, which proves to be a bit challenging.