Check out the wp_cookie_constants()
and ms_cookie_constants()
functions, to see available cookies.
We can try this in the wp-config.php
file:
// Here we just simulate how it's done in the core
define( 'COOKIEHASH', md5( 'http://example.tld' ) );
// Then we override the cookie names:
define( 'USER_COOKIE', 'wpse_user_' . COOKIEHASH );
define( 'PASS_COOKIE', 'wpse_pass_' . COOKIEHASH );
define( 'AUTH_COOKIE', 'wpse_' . COOKIEHASH );
define( 'SECURE_AUTH_COOKIE', 'wpse_sec_' . COOKIEHASH );
define( 'LOGGED_IN_COOKIE', 'wpse_logged_in_' . COOKIEHASH );
define( 'TEST_COOKIE', 'wpse_test_cookie' );
or using PHP 5.6+ :
// Then we override the cookie names:
const USER_COOKIE = 'wpse_user_' . COOKIEHASH;
const PASS_COOKIE = 'wpse_pass_' . COOKIEHASH;
const AUTH_COOKIE = 'wpse_' . COOKIEHASH;
const SECURE_AUTH_COOKIE = 'wpse_sec_' . COOKIEHASH;
const LOGGED_IN_COOKIE = 'wpse_logged_in_' . COOKIEHASH;
const TEST_COOKIE = 'wpse_test_cookie';
where we must adjust the site url http://example.tld
to our needs.
But I also wonder, as @PieterGoosen, why you need to change it.