get_user_option()

function get_user_option( $option, $user = 0, $deprecated = '' ) {
	global $gcdb;

	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, '3.0.0' );
	}

	if ( empty( $user ) ) {
		$user = get_current_user_id();
	}

	$user = get_userdata( $user );
	if ( ! $user ) {
		return false;
	}

	$prefix = $gcdb->get_blog_prefix();
	if ( $user->has_prop( $prefix . $option ) ) { // Blog-specific.
		$result = $user->get( $prefix . $option );
	} elseif ( $user->has_prop( $option ) ) { // User-specific and cross-blog.
		$result = $user->get( $option );
	} else {
		$result = false;
	}

	/**
	 * Filters a specific user option value.
	 *
	 * The dynamic portion of the hook name, `$option`, refers to the user option name.
	 *
	 * @since 2.5.0
	 *
	 * @param mixed   $result Value for the user's option.
	 * @param string  $option Name of the option being retrieved.
	 * @param GC_User $user   GC_User object of the user whose option is being retrieved.
	 */
	return apply_filters( "get_user_option_{$option}", $result, $option, $user );
}