After some try and error, i can say the following:
- the output is from odfconverter (i read it somewhere, but proved it myself)
- the generated tmp-docx Files are corrupted, i can't even open them in Word
- odfconverter as delivered by phpdocx is woking fine on cmd level
So my guess it that the generated tmp-File is the bad boy, but i have no idea to get a valid one.
Any help would be appreciated