How to set PHP $_SERVER variable with Docker? - php

Question

I've created a PHP/Apache/MySQL development environment with Docker and would like to set variable that I can use with $_SERVER in PHP.
Usually I will configure something like that in my virtual host
SetEnv ENV "developement"
Is there a way to do it with my docker_compose.yml file ?
I'll try by using environment: - ENV=developement in my docker-compose file but it doesn't work.
Here is my Dockerfile
FROM php:5.6-apache
RUN apt-get update -y && apt-get install -y libpng-dev curl libcurl4-openssl-dev
RUN docker-php-ext-install pdo pdo_mysql gd curl
RUN a2enmod rewrite
RUN service apache2 restart
and my docker-compose.yml
version: '2'
services:
webserver:
build: ./docker/webserver
image: dev_web
ports:
- "80:80"
- "443:443"
volumes:
- /pathtodev/www:/var/www/html
links:
- db
environment:
- ENV=developement
db:
image: mysql:5.7
ports:
- "3306:3306"
volumes:
- ./db:/var/lib/mysql
environment:
- MYSQL_ROOT_PASSWORD=******
- MYSQL_DATABASE=db_dev

Answer 1

Consider the below Dockerfile
FROM php:5.6-apache
RUN apt-get update -y && apt-get install -y libpng-dev curl libcurl4-openssl-dev
RUN docker-php-ext-install pdo pdo_mysql gd curl
RUN a2enmod rewrite
RUN service apache2 restart
RUN echo 'PassEnv FIRST_NAME' > /etc/apache2/conf-enabled/expose-env.conf
RUN echo '<?php echo $_SERVER["FIRST_NAME"];' > /var/www/html/first.php && echo '<?php echo $_SERVER["LAST_NAME"];' > /var/www/html/last.php
Now run the container using
docker run -it -e FIRST_NAME=TARUN -e LAST_NAME=LALWANI -p 80:80 4ba2aa50347b
Testing
$ curl localhost/first.php
TARUN
$ curl localhost/last.php
$
As you can see the only FIRST_NAME can be accessed, because we exposed the same using PassEnv directive in our apache config insider the container

Answer 2

I know this is a old thread, however, another solution could also be that inside your docker compose, you need to remove the "-" in front of ENV and then instead of "=" it needs to be ":".
It will end up looking like this then:
version: '2'
services:
webserver:
build: ./docker/webserver
image: dev_web
ports:
- "80:80"
- "443:443"
volumes:
- /pathtodev/www:/var/www/html
links:
- db
environment:
ENV: developement
db:
image: mysql:5.7
ports:
- "3306:3306"
volumes:
- ./db:/var/lib/mysql
environment:
- MYSQL_ROOT_PASSWORD=******
- MYSQL_DATABASE=db_dev
At least it's working like that in version 3.