Appendix B. Sample Environment Variables

For the purpose of illustrating what environment variables are passed to the application configuration script on its invocation, we chose the phpBB application package. It is an open-source application and has a simple metadata file, which makes it suitable for the purpose. The application package can be downloaded at http://www.apsstandard.com/app/id,8.

The types of environment variables that are passed to the phpBB configuration script by a Controller are as follows:

• Predefined (see the 4.6.2.1. Full instance URL section of the Specification). These variables do not depend on the metadata file contents.
• Variables defined by the metadata file contents:
  • Variables that are defined by application settings (see the 4.6.2.2. Settings section of the Specification).
  • Aspects-defined (see the 6.3.1.1.1. Environment variables section of the Specification).
  • URL mapping-defined (see the 4.5.4. Environment Variables of the Specification).

The full list of phpBB environment variables list is as follows:

• Predefined environment variables.

  BASE_URL_SCHEME

  BASE_URL_HOST

  BASE_URL_PORT

  BASE_URL_PATH

• Environment variables defined by application settings declarations

  SETTINGS_admin_login

  SETTINGS_admin_passwd

  SETTINGS_admin_email

  SETTINGS_site_name

  SETTINGS_site_desc

  SETTINGS_locale

• Aspects-defined environment variables.

  PHP aspect

  PHP_VERSION

  Database aspect

  DB_main_TYPE

  DB_main_NAME

  DB_main_LOGIN

  DB_main_PASSWORD

  DB_main_HOST

  DB_main_PORT

  DB_main_VERSION

  DB_main_PREFIX

• Environment variables defined by URL mapping declarations

  WEB___DIR

  WEB_images_avatars_DIR