wp-includes/user.php:3690Retrieves the current session token from the logged_in cookie.
stringfunction wp_get_session_token() { $cookie = wp_parse_auth_cookie( '', 'logged_in' ); return ! empty( $cookie['token'] ) ? $cookie['token'] : '';}Introduced in 4.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/user.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.