We point out that following the update of apache towards the new http2 standard, the syntax of the php_value and php_flag variables has now changed.
It's no more like that:
php_value NOMEVARIABILE VALORE
but should be in that way instead:
SetEnv PHP_VALUE "NOMEVARIABILE=VALORE"
You can change these settings directly from the .htaccess files on which you have set these variables.
rif. https://httpd.apache.org/docs/2.4/mod/mod_env.html
RIF. https://miw.li/KBDE512EN