FLoC Permissions Policy Header for Yii 2

web.php

<?php

/**
 * This adds Permissions-Policy header to all Yii 2 app responses blocking FLoC.
 * What is Federated Learning of Cohorts (FLoC)? - read https://web.dev/floc/
 * Google’s FLoC Is a Terrible Idea - read https://www.eff.org/pl/deeplinks/2021/03/googles-floc-terrible-idea
 */
$config = [
    // ... other configuration
    'components' => [
        // ... other components configuration
        'response' => [
            'on beforeSend' => function () {
                Yii::$app->response->headers->add('permissions-policy', 'interest-cohort=()');
            }
        ],
    ],
];

return $config;