Configuration / Accessing & Reading Configuration

Once an application has loaded then you are able to access configuration parameters either in PHP code or via Twig templates within your active theme. As part of the application boot process a few processing steps happen to compile the final configuration and this includes merging any environment specific overrides inside _local.yaml suffixed files.

Accessing Configuration in PHP¶

The configuration service is made available on the Bolt application via the Bolt\Configuration\Config class. You can obtain an instance of the configuration by autowiring the Bolt\Configuration\Config service:

<?php

use Bolt\Configuration\Config;

class ExampleClass
{
    public function __construct(Config $config)
    {
        $sitename = $config->get('general/sitename');
    }
}

The primary method to read configuration variables is $config->get(). Since config variables can take the form of nested arrays then this method allows you to traverse through the array structure by using the slash separator.

Additionally there are prefixes to specify which configuration type you want to read from.

These prefixes are:

"General" refers to the main configuration found in config.yaml. config_local.yaml.

To traverse into an array we just need to specify it in the method call: $config->get('general/thumbnails/quality');

Accessing Configuration in Twig¶

You can use the above method to read configuration values in Twig too, the service is made available in all Twig templates via the config service. Usage is otherwise the same as the PHP details above.

To print the relevant value:

{{ config.get('general/thumbnails/quality') }}

The theme.yaml can also be accessed directly, so it looks cleaner in the template code:

{{ theme.foo }} // Outputs the `foo:` setting