See: https://www.acquia.com/sites/acquia.com/files/documents/2020-03/Acquia%20Ultimate%20Guide%20to%20Drupal%209.pdf https://dev.acquia.com/drupal9 https://github.com/mglaman/drupal-check https://phpstan.org/user-guide/getting-started

The easiest is to add it to "wp-config.php". Something like: 1define('WP_HOME','http://NEW_DOMAIN.com/'); 2define('WP_SITEURL','http://NEW_DOMAIN.com/'); You can test it in curl and see if it works: 1curl -IL http://NEW_DOMAIN.com URL change can be done via wp-cli. Do the …