все получилось, заработало. Вот что делал.
nick@md:~$ sudo a2dismod mpm_event
[sudo] password for nick:
Module mpm_event disabled.
To activate the new configuration, you need to run:
systemctl restart apache2
nick@md:~$ sudo a2enmod mpm_prefork
Considering conflict mpm_event for mpm_prefork:
Considering conflict mpm_worker for mpm_prefork:
Enabling module mpm_prefork.
To activate the new configuration, you need to run:
systemctl restart apache2
nick@md:~$ sudo php -v
PHP 7.0.33-0+deb9u1 (cli) (built: Dec 7 2018 11:36:49) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
with Zend OPcache v7.0.33-0+deb9u1, Copyright (c) 1999-2017, by Zend Technologies
nick@md:~$ sudo a2enmod php7.0
Considering dependency mpm_prefork for php7.0:
Considering conflict mpm_event for mpm_prefork:
Considering conflict mpm_worker for mpm_prefork:
Module mpm_prefork already enabled
Considering conflict php5 for php7.0:
Enabling module php7.0.
To activate the new configuration, you need to run:
systemctl restart apache2
nick@md:~$ sudo systemctl restart apache2
nick@md:~$
пошел смотреть что еще работает-неработает