Kirki_Values::get_value PHP Method

        public static function get_value($config_id = '', $field_id = '')
        {
            // Make sure value is defined.
            $value = '';
            // This allows us to skip the $config_id argument.
            // If we skip adding a $config_id, use the 'global' configuration.
            if ('' === $field_id && '' !== $config_id) {
                $field_id = $config_id;
                $config_id = 'global';
            }
            // If $config_id is empty, set it to 'global'.
            $config_id = '' === $config_id ? 'global' : $config_id;
            // Fallback to 'global' if $config_id is not found.
            if (!isset(Kirki::$config[$config_id])) {
                $config_id = 'global';
            }
            if ('theme_mod' === Kirki::$config[$config_id]['option_type']) {
                // We're using theme_mods so just get the value using get_theme_mod.
                $default_value = null;
                if (isset(Kirki::$fields[$field_id]) && isset(Kirki::$fields[$field_id]['default'])) {
                    $default_value = Kirki::$fields[$field_id]['default'];
                }
                $value = get_theme_mod($field_id, $default_value);
                // If the field is a background field, then get the sub-fields
                // and return an array of the values.
                if (isset(Kirki::$fields[$field_id]) && isset(Kirki::$fields[$field_id]['type']) && 'background' === Kirki::$fields[$field_id]['type']) {
                    $value = array();
                    if (null === $default_value) {
                        $default_value = array();
                    }
                    foreach ($default_value as $property_key => $property_default) {
                        $value[$property_key] = get_theme_mod($field_id . '_' . $property_key, $property_default);
                    }
                }
            } elseif ('option' === Kirki::$config[$config_id]['option_type']) {
                // We're using options.
                if ('' !== Kirki::$config[$config_id]['option_name']) {
                    // Options are serialized as a single option in the db.
                    // We'll have to get the option and then get the item from the array.
                    $options = get_option(Kirki::$config[$config_id]['option_name']);
                    if (!isset(Kirki::$fields[$field_id]) && isset(Kirki::$fields[Kirki::$config[$config_id]['option_name'] . '[' . $field_id . ']'])) {
                        $field_id = Kirki::$config[$config_id]['option_name'] . '[' . $field_id . ']';
                    }
                    $setting_modified = str_replace(']', '', str_replace(Kirki::$config[$config_id]['option_name'] . '[', '', $field_id));
                    // If this is a background field, get the individual sub-fields and return an array.
                    if ('background' === Kirki::$fields[$field_id]['type']) {
                        $value = array();
                        foreach (Kirki::$fields[$field_id]['default'] as $property => $property_default) {
                            if (isset($options[$setting_modified . '_' . $property])) {
                                $value[$property] = $options[$setting_modified . '_' . $property];
                            } else {
                                $value[$property] = $property_default;
                            }
                        }
                    } else {
                        // This is not a background field so continue and get the value.
                        $value = isset($options[$setting_modified]) ? $options[$setting_modified] : Kirki::$fields[$field_id]['default'];
                        $value = maybe_unserialize($value);
                    }
                } else {
                    // Each option separately saved in the db.
                    $value = get_option($field_id, Kirki::$fields[$field_id]['default']);
                    // If the field is a background field, then get the sub-fields.
                    // and return an array of the values.
                    if ('background' === Kirki::$fields[$field_id]['type']) {
                        $value = array();
                        foreach (Kirki::$fields[$field_id]['default'] as $property_key => $property_default) {
                            $value[$property_key] = get_option($field_id . '_' . $property_key, $property_default);
                        }
                    }
                }
            }
            return apply_filters('kirki/values/get_value', $value, $field_id);
        }

 /**
  * Get the value of an option from the db.
  *
  * @static
  * @access public
  * @param string $config_id The ID of the configuration corresponding to this field.
  * @param string $field_id  The field_id (defined as 'settings' in the field arguments).
  * @return mixed The saved value of the field.
  */
 public static function get_option($config_id = '', $field_id = '')
 {
     return Kirki_Values::get_value($config_id, $field_id);
 }