multiroom as server

[lifeform]

I would start with /var/www/inc/renderer.php

@Tim Curtis
sorry for distub once again. i wanna asked again
i added additional debuglog into renderer.php but looks like it never called.
i already restart the nginx and also clear nginx cache but changing directly  /var/www/inc/renderer.php nothing happened. 
what i missed? sorry for asking like this... found nothing several days

i need to test without reboot the raspberry pi. i check opcache also disabled