With OpenTBS you can merge OpenOffice - LibreOffice and Ms Office documents with PHP using the TinyButStrong template engine. Simple use OpenOffice - LibreOffice or Ms Office to edit your templates : DOCX, XLSX, PPTX, ODT, OSD, ODP and other formats. That is the Natural Template philosophy.
Similar to what's already done in https://github.com/Skrol29/tinybutstrong/pull/7