Enable http2 on Debian 9 with Apache 2.4.25 & ISPConfig

OK - Sorry - but it's like becoming crazy: I can't disable "mpm_prefork"
If I disable the module, Apache2 do not (re-)start.
Even If I enable "mpm_event" the "Apache" do not come up.
The final message is still:

Website works without problems, but there's still nothing served by http2

 

a2dismod php*
a2dismod mpm_prefork
a2enmod php*-fpm
a2enmod mpm_event

if you still get the message about php not being threadsafe, try:
apt-get remove libapache2-mod-php*

 

After this steps it seems to be that my Apache is totaly demaged :-(

STOP WAIT.... Thank You Thank You.... Now everything seems to be fine! There was just a sytax-error in the vhost of a domain... But now it works

 

There is still mod_php activated for this domain. The "php_admin_value" command cannot be used without mod_php, thats why there is this error. If you deactivate mod_php Apache will not start up. You first have to change all domains to php_fpm, then deactivate mod_php, then restart apache.

[edit]
Good to hear it works now!

 

Thanx a lot for your help (Steine69, Till and nhybgtvfr)...

There are still two resulting problems/issues - maybe you can help again.

1. After the switch from "mod_php" to "php-fpm" - "phpmyadmin" do not work (browser show plain php-code). I think it's because php is not parsed. How to change phpyadmin to "php-fpm" ... It's located on 111.111.111.111:8080/phpmyadmin
2. After switch to "php-fpm" my websites start with an internal sever error (500) because I've some rules in the .htaccess files (php_value error_reporting 7, php_flag display_errors On, php_value memory_limit 4096M, php_value max_execution_time 180, ...). I fixed the problem with a # on each line). But the question is: How can I turn on display_errors again. In which file I can setup the global values for max_execution_time, php_memory_limit etc. pp.

 

Regarding problem 2:
You should be able to use "SetEnv PHP_VALUE" instead. The better way would be to add this to your PHP config where it belongs (last tab in website options of ispconfig) options -> Custom php.ini settings

and so on..

 

Works like a charm, thank you...

Now I just have to fix the problem with "phpmadymin"

 

Easiest thing would be to deactivate the standard phpmyadmin config (if you are using that), by deleting the symlink:

Code:

rm -i /etc/apache2/conf-enabled/phpmyadmin.conf

Then make a new subdomain website with php-fpm configured and link phpmyadmin like suggested here:
https://www.howtoforge.com/communit...be-enigma-munin-phpmyadmin-aliases-fix.77489/