Configuration Management in Drupal 9: A Guide to Getting, Setting, and Removing Configuration Data

Example Code and Explanation:

// Getting configuration data
$config = \Drupal::config('your_module.settings');
$setting_value = $config->get('your_setting_key');

// Setting configuration data
$config = \Drupal::service('config.factory')->getEditable('your_module.settings');
$config->set('your_setting_key', 'new_value')->save();

// Removing configuration data
$config = \Drupal::service('config.factory')->getEditable('your_module.settings');
$config->clear('your_setting_key')->save();

Explanation:

• Retrieving: Use \Drupal::config() to get configuration, then get() for specific keys.
• Setting: Get an editable config object with \Drupal::service('config.factory')->getEditable(), set values, and save.
• Removing: Similarly, get editable config, use clear() for key removal, and save changes.