get_all_user_settings

	$secure = ( 'https' === parse_url( admin_url(), PHP_URL_SCHEME ) );
	setcookie( 'wp-settings-' . $user_id, $settings, time() + YEAR_IN_SECONDS, SITECOOKIEPATH, null, $secure );
	setcookie( 'wp-settings-time-' . $user_id, time(), time() + YEAR_IN_SECONDS, SITECOOKIEPATH, null, $secure );
	$_COOKIE[ 'wp-settings-' . $user_id ] = $settings;
}

/**
 * Retrieves user interface setting value based on setting name.
 *
 * @since 2.7.0
 *
 * @param string $name    The name of the setting.
 * @param string $default Optional default value to return when $name is not set.
 * @return mixed The last saved user setting or the default value/false if it doesn't exist.
 */
function get_user_setting( $name, $default = false ) {
	$all_user_settings = get_all_user_settings();

	return isset( $all_user_settings[ $name ] ) ? $all_user_settings[ $name ] : $default;
}

/**
 * Adds or updates user interface setting.
 *
 * Both $name and $value can contain only ASCII letters, numbers, hyphens, and underscores.
 *
 * This function has to be used before any output has started as it calls setcookie().
 *
 * @since 2.8.0
 *
 * @param string $name  The name of the setting.