I have a PHP application running on docker and based on php:7.3-alpine3.9
For a big form, I am posting more than 1000 inputs, and I not only I get the error
Warning: Unknown: Input variables exceeded 1000. To increase the limit change max_input_vars in php.ini. in Unknown on line 0`
but worst, only 1000 input are passed to the backend
So it looks like I'd need to change the max_input_vars in the php.ini, but how can I do that ?
Usually, there is some kind of configuration directory that is scanned for further files. Try to place a file containing your local settings there, like the following:
php-ini-overrides.ini:
max_input_vars = 20000
in your Dockerfile:
FROM php:7.3-alpine3.9
# Project-specific ini settings
COPY ./php-ini-overrides.ini /etc/php7/conf.d/
Another way could be to mount that single file through a Docker volume (this keeps the container configuration cleaner and is more simple if you don't want to use a Dockerfile for other purposes; additionally, you don't need to update the container when changing the configuration, but only restart it):
volumes:
- ./php-ini-overrides.ini:/etc/php7/conf.d/php-ini-overrides.ini
This will work the best way, as you don't have to modify any existing file or keep track of changes from the upstream container
As a short hint: if the solution does not work directly, check whether you need to adjust the folder to put that file into. Another base image might place that folder to another location