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Update README.md #38

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Expand Up @@ -36,6 +36,22 @@ Or in nginx with fcgi:

fastcgi_param APP_ENV dev

Configuration values are set on the `$app` object. For example, to retrieve the `debug` configuration value, you can simply access the `debug` key of `$app`.

$app->get('/', function() use ($app) {
echo $app['debug'];
});

In order to prevent your configuration from overriding the keys that might be set on the application, you can pass in a `prefix` to the constructor. This prefix will then be available as a key under which all your other configuration can be accessed:

$app->register(new Igorw\Silex\ConfigServiceProvider(__DIR__."/../config/$env.json", array(), null, 'example'));

You can now access the `debug` value defined in your configuration like this:

$app->get('/', function() use ($app) {
echo $app['example']['debug'];
});

### Replacements

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