Disable Core WordPress Update Notice

When working on projects, I often want to strictly control the version of WordPress that is running. However sometimes one of the other administrators on the site sees the “WordPress 5.9 is available! Please update now.” message and clicks it, thereby prematurely updating to a newer version of WordPress core. This notice can be disabled.

Here is the code to disable the WordPress core update notice.

add_action(
    'admin_notices',
    function() {
        remove_action( 'admin_notices', 'update_nag', 3 );
    },
    2
);

Sal Ferrarello (@salcode)

Sal is a PHP developer with a focus on the WordPress platform. He is a conference speaker with a background including Piano Player, Radio DJ, Magician/Juggler, Beach Photographer, and High School Math Teacher. Sal can be found professionally at WebDevStudios, where he works as a senior backend engineer.