WP_Customize_Manager::unsanitized_post_values PHP Method

    public function unsanitized_post_values($args = array())
    {
        $args = array_merge(array('exclude_changeset' => false, 'exclude_post_data' => !current_user_can('customize')), $args);
        $values = array();
        // Let default values be from the stashed theme mods if doing a theme switch and if no changeset is present.
        if (!$this->is_theme_active()) {
            $stashed_theme_mods = get_option('customize_stashed_theme_mods');
            $stylesheet = $this->get_stylesheet();
            if (isset($stashed_theme_mods[$stylesheet])) {
                $values = array_merge($values, wp_list_pluck($stashed_theme_mods[$stylesheet], 'value'));
            }
        }
        if (!$args['exclude_changeset']) {
            foreach ($this->changeset_data() as $setting_id => $setting_params) {
                if (!array_key_exists('value', $setting_params)) {
                    continue;
                }
                if (isset($setting_params['type']) && 'theme_mod' === $setting_params['type']) {
                    // Ensure that theme mods values are only used if they were saved under the current theme.
                    $namespace_pattern = '/^(?P<stylesheet>.+?)::(?P<setting_id>.+)$/';
                    if (preg_match($namespace_pattern, $setting_id, $matches) && $this->get_stylesheet() === $matches['stylesheet']) {
                        $values[$matches['setting_id']] = $setting_params['value'];
                    }
                } else {
                    $values[$setting_id] = $setting_params['value'];
                }
            }
        }
        if (!$args['exclude_post_data']) {
            if (!isset($this->_post_values)) {
                if (isset($_POST['customized'])) {
                    $post_values = json_decode(wp_unslash($_POST['customized']), true);
                } else {
                    $post_values = array();
                }
                if (is_array($post_values)) {
                    $this->_post_values = $post_values;
                } else {
                    $this->_post_values = array();
                }
            }
            $values = array_merge($values, $this->_post_values);
        }
        return $values;
    }

 /**
  * @ticket 34738
  * @see WP_Customize_Widgets::call_widget_update()
  */
 function test_call_widget_update()
 {
     $widget_number = 2;
     $widget_id = "search-{$widget_number}";
     $setting_id = "widget_search[{$widget_number}]";
     $instance = array('title' => 'Buscar');
     $_POST = wp_slash(array('action' => 'update-widget', 'wp_customize' => 'on', 'nonce' => wp_create_nonce('update-widget'), 'theme' => $this->manager->get_stylesheet(), 'customized' => '{}', 'widget-search' => array(2 => $instance), 'widget-id' => $widget_id, 'id_base' => 'search', 'widget-width' => '250', 'widget-height' => '200', 'widget_number' => strval($widget_number), 'multi_number' => '', 'add_new' => ''));
     $this->do_customize_boot_actions();
     $this->assertArrayNotHasKey($setting_id, $this->manager->unsanitized_post_values());
     $result = $this->manager->widgets->call_widget_update($widget_id);
     $this->assertInternalType('array', $result);
     $this->assertArrayHasKey('instance', $result);
     $this->assertArrayHasKey('form', $result);
     $this->assertEquals($instance, $result['instance']);
     $this->assertContains(sprintf('value="%s"', esc_attr($instance['title'])), $result['form']);
     $post_values = $this->manager->unsanitized_post_values();
     $this->assertArrayHasKey($setting_id, $post_values);
     $post_value = $post_values[$setting_id];
     $this->assertInternalType('array', $post_value);
     $this->assertArrayHasKey('title', $post_value);
     $this->assertArrayHasKey('encoded_serialized_instance', $post_value);
     $this->assertArrayHasKey('instance_hash_key', $post_value);
     $this->assertArrayHasKey('is_widget_customizer_js_value', $post_value);
     $this->assertEquals($post_value, $this->manager->widgets->sanitize_widget_js_instance($instance));
 }