silex-config

Lightweight configuration service provider for Silex 2.0+ micro-framework.

This project is a part of silex-tools library.

Installation

You can install silex-config with Composer:

composer require lokhman/silex-config

Documentation

Simple and lightweight configuration provider, which uses JSON files to manage application configuration. Library supports different environments via setting a global environment variable.

use Lokhman\Silex\Provider\ConfigServiceProvider;

$app->register(new ConfigServiceProvider(), [
    'config.dir' => __DIR__ . '/../app/config',
]);

File structure

First off, create a config folder in your application directory and add configuration JSON files one per intended environment (default is local):

/
  app/
    config/
      dev.json
      local.json
      prod.json
      staging.json
    logs/
  src/
  tests/
  vendor/
  web/
    index.php
  composer.json
  ...

Config files

Next, add all your defaults to the config files, e.g.:

{
    "env": "%__ENV__%",
    "debug": true,
    "dbs.options": {
        "default": {
            "driver": "pdo_mysql",
            "host": "localhost",
            "dbname": "database",
            "user": "root",
            "password": "",
            "charset": "utf8"
        }
    },
    "any": {
        "other": "constant"
    }
}

Register

Now register service provider in your Silex application:

use Lokhman\Silex\Provider as ToolsProviders;

$app->register(new ToolsProviders\ConfigServiceProvider(), [
    'config.dir' => __DIR__ . '/../app/config',
]);

config.dir parameter refers to a configuration folder path with JSON files.

Global environment variable

Finally, you can set up your web server to add support of different deployment environments. In order to do this, you have to set a global environmental variable.

nginx + PHP-FPM

fastcgi_param SILEX_ENV prod

Apache

SetEnv SILEX_ENV prod

CLI

$ SILEX_ENV=prod bash -c "php bin/console migrations:status"

If you use Console Application together with ConfigServiceProvider you can pass --env (-e in short) option to all registered commands:

$ php bin/console migrations:status --env=prod

Parameters

ConfigServiceProvider supports the following parameters:

Parameter	Description	Default
config.dir	Folder path with JSON files.	null
config.params	Array of replacement tokens to use in configuration.	[]
config.env	Environment to use strictly on provider registration (ignores global environment variable).	"local"
config.varname	Name of global environment variable.	"SILEX_ENV"

By default, service provider embeds tokens __DIR__ and __ENV__, as well as all PHP environment variables (e.g. REMOTE_ADDR, SERVER_NAME, etc).

Dynamic tokens

You can define tokens dynamically in the JSON files using property $params:

local.json
{
    "$params": {
        "SECRET": "3ecd45ff71c87269569e682f2f6b2ec4"
    },
    "settings": {
        "prop1": "%SECRET%",
        "prop2": "%secret%",
        "prop3": "%SeCrEt%"
    }
}

N.B.: All tokens are case insensitive.

Extending

You can extend JSON configuration (include one JSON file into another) simply using root property $extends, that points to the file to extend (file extension can be omitted). For example:

local.json
{
    "env": "%__ENV__%",
    "debug": true,
    "locale": "en"
}

prod.json
{
    "$extends": "local",
    "debug": false
}

License

Library is available under the MIT license. The included LICENSE file describes this in detail.