添加custom endpoint 非常简单。

我还修改了url，使其看起来更像

http://example.com/wp-json/namespace/v2/posts?filter[meta_value][month]=12&filter[meta_value][year]=2015

function wp_json_namespace_v2__init()
{

    // create json-api endpoint

    add_action(\'rest_api_init\', function () {

        // http://example.com/wp-json/namespace/v2/posts?filter[meta_value][month]=12&filter[meta_value][year]=2015

        register_rest_route(\'namespace/v2\', \'/posts\', array (
            \'methods\'             => \'GET\',
            \'callback\'            => \'wp_json_namespace_v2__posts\',
            \'permission_callback\' => function (WP_REST_Request $request) {
                return true;
            }
        ));
    });

    // handle the request

    function wp_json_namespace_v2__posts($request)
    {
        // json-api params

        $parameters = $request->get_query_params();

        // default search args

        $args = array(
            \'post_type\'      => \'post\',
            \'post_status\'    => \'publish\',
            \'numberposts\'    => -1,
            // limit to only ids
            // \'fields\'      => \'ids\', 
        );

        // check the query and add valid items

        if (isset($parameters[\'filter\'][\'meta_value\'])) {
            foreach ($parameters[\'filter\'][\'meta_value\'] as $key => $value) {
                switch ($key) {

                    case \'month\':
                        if (is_numeric($value))
                            $args[\'monthnum\'] = $value;
                        break;

                    case \'year\':
                        if (is_numeric($value))
                            $args[\'year\'] = $value;
                        break;
                }
            }
        }

        // run query

        $posts = get_posts($args);

        // return results

        $data = array(
            \'success\' => true,
            \'request\' => $parameters,
            \'count\' => count($posts),
            \'posts\' => $posts,
        );

        return new WP_REST_Response($data, 200);
    }

    flush_rewrite_rules(true); // FIXME: <------- DONT LEAVE ME HERE
}

add_action(\'init\', \'wp_json_namespace_v2__init\');