PHP-CONFIG

This project is a loose port of node-config. I've only implemented enough of it to help me get going with an existing project.

What does it do?

The goal of this package is to help you manage configuration files separated by environment, but used as a single object.

How it works

Suppose your application exists in three environments: development, stage, and production. Each environment has its own unique configurations, and all three share some configuration in common.

As an organized developer, you'll create a config directory somewhere in your project, where you'll store the following files:

/project
  /config
     default.json
     development.json
     stage.json
     production.json

// config/default.json
{
  "appVersion": "1.0.0",
  "app": {
    "views": {
      "cache": false
    }
  }
}

// config/development.json
{
  "db": {
    "username": "root",
    "password": "",
    "host": "localhost"
  }
}

// config/default.json
{
  "db": {
    "username": "stage-user",
    "password": "stage-password",
    "host": "stage-db"
  }
}

// config/default.json
{
  "db": {
    "username": "secure-user",
    "password": "secure-password",
    "host": "super-cluster"
  },
  "app": {
    "views": {
      "cache": true
    }
  }
}

You'll then have a single config object for whatever environment you're in, where default.json and the environment-specific .json object are merged together, with the default values being overwritten by the environment values (using a shallow merge).

$env = getenv('APP_ENV');
$configPath = __DIR__ . '/config';

$config = new Formigone\Config($env, $configPath);

$appVersion = $config->get('appVersion');
$db = $config->get('db');
$shouldCacheViews = $config->get('app.views.cache');

Why reinvent the wheel?

So this project essentially mimics ZF1's Zend_Config, which allows for inheritable configs. Why use this instead?

• Why use JSON?
  • So configs can be shared across PHP and JavaScript/Node.js
• Why not use Zend_Config_Json?
  • Because Zend_Config_Json only parses a single file. That works fine in PHP, but if you use something in Node.js like node-config (which is what I happen to use), the you can't reuse the same config files. Given my specific use case (where I'm reusing configs and starting off with node-config), this makes sense, and hence my need for this package.