FAQ – Frequently Asked Questions about Onartline Multisite Domain Mapping
Answer: We recommend against it. Onartline Multisite Domain Mapping is designed for new Multisite installations and wasn’t built to be integrated into an already active network afterward. If you’re already running a live Multisite network, we recommend first setting up a new installation and migrating your existing content there, rather than integrating the plugin into your current network. You’ll find a detailed guide in our setup guide.
Answer: A redirect loop usually happens due to a duplicate redirect – for example, when a “Preferred Domain” setting in the hosting panel (such as Plesk) is active at the same time as the plugin’s 301 redirect. You’ll find the exact causes and the right solution for your hosting setup step by step in our setup guide.
Answer: In rare cases, the sunrise.php file may not be copied automatically to the /wp-content/ directory when activating the plugin, for example due to missing write permissions on the server. In this case, you can simply copy the file manually from the plugin folder to /wp-content/sunrise.php and then add the line define( 'SUNRISE', true ); to your wp-config.php. You’ll find a detailed step-by-step guide in our setup guide.
Answer: Onartline Multisite Domain Mapping requires a WordPress Multisite installation with WordPress 7.0 and PHP 8.3 or higher. The plugin cannot function on a single WordPress installation (single-site installation) without an activated Multisite network.
Answer: Yes, that’s possible. The Super Admin can enable this feature under Network Admin → Domain Mapping → Settings → Site Admin Domain Mapping, allowing individual website administrators to manage their own domain settings.
Answer: Yes. Onartline Multisite Domain Mapping is published in the official WordPress plugin directory. Updates work automatically through the WordPress admin, just as you’re already used to with other plugins.
Answer: This error occurs when the line define( 'SUNRISE', true ); wasn’t removed from wp-config.php after uninstalling the plugin. Since the sunrise.php file no longer exists after uninstallation, WordPress still tries to load it and fails. To fix this, simply remove that line from your wp-config.php.