Description:
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Hello, few days ago, I've submit a bug #80013 about memcached session handler.

I hadn't been able to pinpoint the exact cause of the problem. Today I found out what was wrong with my memcached session management.
We happen to use the php_value directive in our apache configuration. And it's this directive that is the problem.
Here is a very simple docker container that changes a random option (max_input_vars). When the service is started, the access to index.php has the value of max_input_var.
At the first call the value is good with 1234, at the second call it returns to 1000 (PHP default value).
When I open a private browsing, without shutting down the service, the value is good again, then bad at the second call.
When I pause for one minute (to end the keepalive), the value becomes good again, then bad.
If I restart the service from the php:apache version, I don't note this bad behavior with a value always at 1234.


Test script:
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Dockerfile php8:

FROM php:rc-apache
RUN sed -i "/Include /c\php_value max_input_vars '1234'" /etc/apache2/sites-enabled/000-default.conf \
    && echo '<pre><?= ini_get("max_input_vars");' > /var/www/html/index.php

Command php8 :
docker build . -t test8_php_value
docker run -p "9980:80" test8_php_value

Dockerfile php7:

FROM php:apache
RUN sed -i "/Include /c\php_value max_input_vars '1234'" /etc/apache2/sites-enabled/000-default.conf \
    && echo '<pre><?= ini_get("max_input_vars");' > /var/www/html/index.php

Command php7 :
docker build . -t test7_php_value
docker run -p "9974:80" test7_php_value







Expected result:
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1234

Actual result:
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1000