Environment Variables

For each website, the following environment variables are created by default, and are available within the shell and also the webserver:

WEBSITE_CONTEXT (PROD, STAGE or DEV, see Context)
WEBSITE_SERVER_NAME (Configured server names within this website)
DB_HOST (Database hostname, only if there is a database)
DB_NAME (Database name, only if there is a database)
DB_USERNAME (Database username, only if there is a database)
DB_PASSWORD (Database password, only if there is a database)
PROXY_PASS (Proxy Pass, only for type proxy)

Custom Environment Variables

You can set or override environment variables per website, use the envvar option in custom JSON:

{
  "envvar": {
    "MYENVVAR": "this is the value",
    "DB_HOST": "override global DB_HOST variable here",
    "http_proxy": "override global http_proxy variable here"
  }
}

Warning

Variable names can only contain lower and uppercase letters [A-Za-z], numbers [0-9] and underscores _, also they cannot begin with a number.

Example Usage in PHP

$config = array(
  'db_host'     => $_SERVER['DB_HOST'],
  'db_name'     => $_SERVER['DB_NAME'],
  'db_username' => $_SERVER['DB_USERNAME'],
  'db_password' => $_SERVER['DB_PASSWORD'],
)