### Summary of problem or feature request [Search after](https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-search-after.html) is not implemented in PHP client! And how much more features was not released in "version 5" of PHP client? Please, fix it asap. ### System details <!-- Please include these details about your system! If they are omitted, the ticket will be deprioritized over other users requests/tickets. --> - Operating System: Linux - PHP Version: 5.6 - ES-PHP client version: 5.0 - Elasticsearch version: 5.2