WP_Customize_Manager::refresh_changeset_lock( int $changeset_post_id )

Source

public function refresh_changeset_lock( $changeset_post_id ) {
	if ( ! $changeset_post_id ) {
		return;
	}

	$lock = get_post_meta( $changeset_post_id, '_edit_lock', true );
	$lock = explode( ':', $lock );

	if ( $lock && ! empty( $lock[1] ) ) {
		$user_id         = (int) $lock[1];
		$current_user_id = get_current_user_id();
		if ( $user_id === $current_user_id ) {
			$lock = sprintf( '%s:%s', time(), $user_id );
			update_post_meta( $changeset_post_id, '_edit_lock', $lock );
		}
	}
}

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