使用Systemd时，从PHP-FPM中看不到/ tmp的内容

Question

Directory /tmp is not accessible from PHP-FPM running as Systemd service.

Steps to reproduce:

<?php
print_r(shell_exec('ls /tmp'));
?>

Answer 1

This is default behaviour set by package maintainers. It's because there is PrivateTmp=true in /usr/lib/systemd/system/php-fpm.service.

If you want to change it, you can create /etc/systemd/system/php-fpm.service.d/private-tmp.conf with contents:

[Service] PrivateTmp=false