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Dot Env (.env)

The HumHub's .env file provides a mechanism for mapping environment variables to the configuration array used by the Yii framework. This allows for clean separation of configuration and code.

Overview​

The HumHub's .env file mechanism is not enabled by default. It is designed for advanced users who want to customize their HumHub configuration in a flexible way. To enable it, users can create a .env file by copying the provided .env.example template:

cp .env.example .env

Afterward, users can populate the .env file with their custom configurations.

Important: Be sure that the contents of the .env file are not accessible to the web. Make sure to secure it using proper file permissions or server configuration to prevent unauthorized access.

Configuration File Sequence​

HumHub's configuration is built from multiple files, and the .env file has the highest priority, overwriting all other configurations.

Sequence of Configuration Files​

  1. Base Configurations:
  • protected/humhub/config/common.php
  • protected/humhub/config/web.php (for Web application)
  • protected/humhub/config/console.php (for Console application)
  1. Dynamic Configurations:
  • protected/config/dynamic.php
  1. Custom Configurations:
  • protected/config/common.php
  • protected/config/web.php (for Web application)
  • protected/config/console.php (for Console application)
  1. Environment Variables:
  • .env

Key Features​

  • Environment-Specific Prefixes:

    • HUMHUB_FIXED_SETTINGS: Immutable settings.
    • HUMHUB_CONFIG: General Yii configuration.
    • HUMHUB_WEB_CONFIG: Web application-specific configuration.
    • HUMHUB_CLI_CONFIG: Console application-specific configuration.
    • HUMHUB_ALIASES: Yii alias definitions.

  • Array Depth Separator:
    Uses __ to represent nested keys in arrays.

  • Key Conversion:
    Converts environment variable segments into camelCase.

  • Automatic Value Normalization:
    Supports JSON decoding and boolean value conversion.

  • Alias Support:
    Maps environment-defined aliases to Yii aliases.

Debug Mode​

The HUMHUB_DEBUG environment variable controls Yii's debugging and environment settings.

Behavior​

  • When HUMHUB_DEBUG=true:
    • Sets YII_DEBUG to true
    • Sets YII_ENV to dev
  • When HUMHUB_DEBUG=false or not set:
    • Sets YII_DEBUG to false
    • Sets YII_ENV to prod

Supported Prefixes​

HUMHUB_FIXED_SETTINGS​

  • Purpose: Defines fixed settings under params['fixed-settings'].
  • Example: 
    HUMHUB_FIXED_SETTINGS__EXAMPLE1__EXAMPLE2=Something
    Resulting Configuration: 
    $config['params']['fixed-settings']['example1']['example2'] = 'Something';

HUMHUB_CONFIG​

  • Purpose: General Yii configuration.
  • Example: 
    HUMHUB_CONFIG__COMPONENTS__URL_MANAGER__ENABLE_PRETTY_URL=true
    HUMHUB_CONFIG__COMPONENTS__URL_MANAGER__SHOW_SCRIPT_NAME=false
    Resulting Configuration: 
    $config['components']['urlManager']['enablePrettyUrl'] = true;
    $config['components']['urlManager']['showScriptName'] = false;

HUMHUB_WEB_CONFIG​

  • Purpose: Web application-specific configuration.
  • Example: 
    HUMHUB_WEB_CONFIG__COMPONENTS__ASSET_MANAGER__FORCE_COPY=true
    Resulting Configuration: 
    $config['components']['assetManager']['forceCopy'] = true;

HUMHUB_CLI_CONFIG​

  • Purpose: Console application-specific configuration.
  • Example: 
    HUMHUB_CLI_CONFIG__COMPONENTS__CACHE__CLASS=FileCache
    Resulting Configuration: 
    $config['components']['cache']['class'] = 'FileCache';

HUMHUB_ALIASES​

  • Purpose: Maps aliases for Yii.
  • Example: 
    HUMHUB_ALIASES__WEBROOT=/var/www/app
    HUMHUB_ALIASES__UPLOADS=/var/www/app/uploads
    Resulting Aliases: 
    Yii::setAlias('@webroot', '/var/www/app');
    Yii::setAlias('@uploads', '/var/www/app/uploads');

Value Normalization​

  • Boolean Values: Strings like true and false are converted to booleans.

    HUMHUB_CONFIG__COMPONENTS__URL_MANAGER__ENABLE_PRETTY_URL=true
    $config['components']['urlManager']['enablePrettyUrl'] = true;

  • JSON Decoding: Strings are decoded into arrays or objects.

    HUMHUB_CONFIG__PARAMS__SUPPORTED_LANGUAGES=["en", "de", "fr"]
    $config['params']['supportedLanguages'] = ['en', 'de', 'fr'];

Example Configuration​

Sample .env File​

HUMHUB_FIXED_SETTINGS__EXAMPLE1__EXAMPLE2=Something
HUMHUB_CONFIG__COMPONENTS__URL_MANAGER__ENABLE_PRETTY_URL=true
HUMHUB_WEB_CONFIG__COMPONENTS__ASSET_MANAGER__FORCE_COPY=true
HUMHUB_CLI_CONFIG__COMPONENTS__CACHE__CLASS=FileCache
HUMHUB_ALIASES__WEBROOT=/var/www/app

Resulting Configuration​

$config = [
    'params' => [
        'fixed-settings' => [
            'example1' => [
                'example2' => 'Something',
            ],
        ],
    ],
    'components' => [
        'urlManager' => [
            'enablePrettyUrl' => true,
        ],
        'assetManager' => [
            'forceCopy' => true,
        ],
        'cache' => [
            'class' => 'FileCache',
        ],
    ],
    'aliases' => [
        '@webroot' => '/var/www/app',
    ],
];