WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. Features include a plugin architecture...
How do I move WordPress from a subfolder to my domain's main address?
Before moving anything, save a copy of your files and database, and check whether the main directory already contains a website you could overwrite. Record the current URLs and decide whether you want to move the entire installation or simply display the site at the main address: these require different approaches.
For a complete move, follow the WordPress relocation documentation, update the site URLs and check the permalink rules. If you replace URLs in the database, use a tool that handles serialised data rather than a simple replacement in an SQL file. Test login, images, forms and internal pages, then configure redirects from the old URLs to the new ones.
