If you simply want to change how a post type is displayed in the WordPress admin, you can simply change its labels, or use a plugin like this one to do it for you. If on the other hand you need to rename the post type’s slug for some technical reason, then you can follow the steps below. They assume you’re comfortable editing code and using WP-CLI. Before proceeding, make sure you have a complete backup of your site, including the database, that you can revert back to if you have to.
- Search for all instances of the post type slug and replace them with the new one. Be careful to capture any CSS selectors written to use the classes that WordPress automatically creates
For example, if the old post type name is ‘property’, then WP will automatically add a class of ‘single-property’ to the body element on single Property pages. Knowing that, you’d have to change a CSS selector like the one below to reflect your new post type name.
2. Rename files whose names contain the old slug. For instance, you would need to change single-old_name.php to single-new_name.php, and page-old_name.php to page-new_name.php.
3. Run a search and replace command to replace the custom post type name in the database. If the old CPT is something unique like “km_articles” the method below for doing a search & replace may work. If it’s a common dictionary word like “articles” I would not recommend doing this, however – you’ll likely need a more complex SQL command that only modifies the database columns and rows where CPT slugs exist.
Running this WP-CLI command would work for a single WP install:
wp search-replace property new-name
…or this for all the sites in a multisite network:
wp search-replace property new-name --network
Just read the WP-CLI documentation on that command and make sure you’re only affecting the database tables you need to. Check out the --dry-run flag you can include to have WP-CLI show you how many changes it would make first, without actually doing the search & replace until you’re ready.