Php has its own /tmp in /tmp/systemd-private-nABCDE/tmp when accessed through nginx

Question

I found strange behaviour concerning php and /tmp folder. Php uses another folder when it works with /tmp. Php 5.6.7, nginx, php-fpm.

Answer 1

Because systemd is configured to give nginx a private /tmp. If you must use the system /tmp instead for some reason then you will need to modify the .service file to read "PrivateTmp=no".