It looks like you're using PHP as an Apache extension (mod_php) with the
Event MPM. This is not a recommended setup.
Either switch to PHP-FPM (I would recommend this option) or use the
Prefork MPM.
Using PHP-FPM will completely separate PHP and Apache, which will reduce
the potential for issues (particularly if using PHP from a third party
repo or self-compiled), as well as being more flexible and performant.
See the warnings on https://www.php.net/manual/en/install.unix.apache2.php
See also https://cwiki.apache.org/confluence/display/HTTPD/PHP
