CODEWITHSUNDEEP
phpdockervariablesenvironment-variables
Jimmix
Jimmix

Reputation: 6526

PHP on Docker - pass a variable to container by docker run CLI command

There is a docker php container run by docker run command.

1.How to pass by using docker run command a variable to the php container?

2.How to read value of the passed variable from php script in that container?

Context: PHP script inside a docker container connects to a database that is located on an another container. I need to run several php containers that connect to differently named database containers.

I can't have hardcoded database container name inside the php script and need to pass database conatainer name dynamically when I use docker run to startup php containers.

Upvotes: 1

Views: 1277

Answers (2)

Harry
Harry

Reputation: 154

This didn't work for me on Ubuntu 22.04 with PHP 8.1, however using the same env variable in docker run:

-e DB_NAME='hostname'

and in PHP:

echo "My DB name is ".getenv('DB_NAME').".\n";

... did work correctly.

Upvotes: 1

joseph
joseph

Reputation: 1008

You can pass an environment variable using the -e DB_NAME='hostname' as mentioned in this answer https://stackoverflow.com/a/30494145/2940966.

The environment variable can be accessed from the PHP script as follows.

echo 'The DB Name is ' .$_ENV["DB_NAME"];

Upvotes: 0

Related Questions