ConfigServiceProvider

A config ServiceProvider for Silex with support for php, json, yaml, and toml.

Usage

Passing a config file

Pass the config file's path to the service provider's constructor. This is the recommended way of doing it, allowing you to define multiple environments.

$env = getenv('APP_ENV') ?: 'prod';
$app->register(new Igorw\Silex\ConfigServiceProvider(__DIR__."/../config/$env.json"));

Now you can specify a prod and a dev environment.

config/prod.json

{
    "debug": false
}

config/dev.json

{
    "debug": true
}

To switch between them, just set the APP_ENV environment variable. In apache that would be:

SetEnv APP_ENV dev

Or in nginx with fcgi:

fastcgi_param APP_ENV dev

Replacements

Also, you can pass an array of replacement patterns as second argument.

$app->register(new Igorw\Silex\ConfigServiceProvider(__DIR__."/../config/services.json", array(
    'data_path' => __DIR__.'/data',
)));

Now you can use the pattern in your configuration file.

/config/services.json

{
    "xsl.path": "%data_path%/xsl"
}

You can also specify replacements inside the config file by using a key with %foo% notation:

{
    "%root_path%": "../..",
    "xsl.path": "%root_path%/xsl"
}

Using Yaml

To use Yaml instead of JSON, just pass a file that ends on .yml:

$app->register(new Igorw\Silex\ConfigServiceProvider(__DIR__."/../config/services.yml"));

Note, you will have to require the ~2.2 of the symfony/yaml package.

Using TOML

To use TOML instead of any of the other supported formats, just pass a file that ends on .toml:

$app->register(new Igorw\Silex\ConfigServiceProvider(__DIR__."/../config/services.toml"));

Note, you will have to require the ~0.1 of the jamesmoss/toml package and you are using a bleeding edge configuration format, as the spec of TOML is still subject to change.

Using plain PHP

If reading the config file on every request becomes a performance problem in production, you can use a plain PHP file instead, and it will get cached by APC.

You'll have to rewrite your config to be a PHP file that returns the array of config data, and also make sure it ends with .php:

$app->register(new Igorw\Silex\ConfigServiceProvider(__DIR__."/../config/prod.php"));

Multiple config files

You can use multiple config files, e. g. one for a whole application and a specific one for a task by calling $app->register() several times, each time passing another instance of Igorw\Silex\ConfigServiceProvider.

Register order

Make sure you register ConfigServiceProvider last with your application. If you do not do this, the default values of other Providers will override your configuration.