wp-includes/ms-blogs.php:695Switches the initialized roles and current user capabilities to another site.
$new_site_idint$old_site_idintfunction wp_switch_roles_and_user( $new_site_id, $old_site_id ) { if ( $new_site_id === $old_site_id ) { return; } if ( ! did_action( 'init' ) ) { return; } wp_roles()->for_site( $new_site_id ); wp_get_current_user()->for_site( $new_site_id );}Introduced in 4.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ms-blogs.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.