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yii2-environment

Environment-based configuration class (for example in development, testing, staging and production) for Yii2 basic application template.

It is used to set configuration and debugging depending on environment. You can predefine configurations for use in different environments, like development, testing, staging and production.

This library is mainly based on Environment extension for Yii 1 by Marco van 't Wout. Those who have accustomed with it's previous version could easily use this version with Yii2. It is probably useless for advanced application template since environment management for it has already been provided by framework developers. Nevertheless, I don't like advanced template for several reasons but do want to handle environment configurations in basic template.

The main config (main.php) is extended to include the Yii path and debug flags. There are mode_<environment>.php files for overriding and extending main.php for specific environments. Additionally, you can overrride the resulting config by using a local.php config, to make changes that will only apply to your specific installation.

This class was designed to have minimal impact on the default Yii generated files. Minimal changes to the index/bootstrap and existing config files are needed.

The Environment is determined with PHP's getenv(), which searches $_SERVER and $_ENV. There are multiple ways to set the environment depending on your preference. Setting the environment variable is trivial on both Windows and Linux, instructions included. You can optionally override the environment by creating a mode.php in the config directory.

If you want to customize this class or its config and modes, extend it! (see ExampleEnvironment.php)

Requirements

Tested on current (unstable) Yii2, and will probably work after final release (I'll keep track on it's updates to be sure).

Installation

Installation via Composer

The preferred installation method is through Composer. We assume the vendor directory is placed in application root.

1. Add the dependency to your project

2. Modify your web/index.php (and other bootstrap files)
3. Modify your main.php config file and add mode specific config files
4. Set your local environment (see next section)

Installation from zip file

Download zip archive and extract it to, say, components directory. Then include the Environment class manually in your index.php since composer autoload will not be available for it.

Setting environment

Here are some examples for setting your environment to DEV.

Windows

1. Go to: Control Panel > System > Advanced > Environment Variables
2. Add new SYSTEM variable: name = YII_ENV, value = DEV
   • Details: http://support.microsoft.com/kb/310519/en-us

Linux/Mac

1. Open profile files:
   • Global bash shell: /etc/profile
   • Apache (as service): /etc/apache2/envvars
2. Add the following line: export YII_ENV="DEV"
   • Details: http://www.cyberciti.biz/faq/linux-unix-set-java_home-path-variable/

Apache only (cannot be used for console applications)

1. Check if mod_env is enabled
2. Open your httpd.conf or create a .htaccess file
3. Add the following line: SetEnv YII_ENV DEV
   • Details: http://httpd.apache.org/docs/1.3/mod/mod_env.html#setenv

Project only

1. Create a file mode.php in the config directory of your application.
2. Set the content of the file to: DEV

Usage

Update bootstrap files

See example-index/index.php

Structure of config directory

Your config/ directory will look like this:

Modify your config/main.php

See example-config/main.php

Optional: in configConsole you can copy settings from configWeb by using value key @ (see examples folder).

Create mode-specific config files

Create config/mode_<mode>.php files for the different modes. These will override or merge attributes that exist in the main config.

• See example-config/mode_dev.php
• See example-config/mode_test.php
• See example-config/mode_staging.php
• See example-config/mode_prod.php

Optional: also create a config/local.php file for local overrides.

Credits

Original library for Yii 1: https://github.com/marcovtwout/yii-environment

Notes

• I tried to keep the library as much compatible with it's previous version as possible. Still, I have introduced some changes.

  • First, in order to 'inherit' configuration from configWeb in configConsole you should use @ symbol instead of inherit keyword (that looks much shorter!).
  • Second, in order to keep the names of environments uniformly with Yii2, I have changed development mode to dev, production to prod, and testing to test. There're now handy boolean constants like YII_ENV_DEV set up for you by Yii, and this library makes sure they're defined according to selected mode.
• This is probably my first project on github, so I gladly expect issue reports, pull requests, any help, comments or criticism.