The document discusses the WordPress JSON REST API, which allows accessing a WordPress site's data through an HTTP REST API. It started as a Google Summer of Code project and is now provided as a plugin, with plans to merge it into WordPress core. The API provides resources like posts, media, users, and taxonomy terms. The document provides an example of building an app with the concrete5 framework to get, insert, and retrieve posts from a WordPress site using the JSON REST API and OAuth authentication.

1. Getting Started with
WordPress JSON REST API
Takuro Hishikawa
concrete5 Japan Inc.
!
An author of Really Simple CSV Importer plugin
(20,000+ download! Thanks!)

2. What Is the JSON REST
API?
• Started as GSOC project
• Now provided as plugin
• Planned merge into core at future release

3. “Access your WordPress site’s data through
an easy-to-use HTTP REST API.”
–http://wp-api.org/

4. “JSON is a data format based on
Javascript’s representation of objects, but
it’s widely used because it can be easily
represented in almost every programming
language.”
–Ryan McCue
http://wptavern.com/ryan-mccue-on-creating-the-json-rest-api-for-wordpress

5. Resources
• Posts (Create/Retrieve/Edit/Delete)
• Meta (Create/Retrieve/Edit/Delete)
• Media (Create/Get)
• Users (Create/Retrieve/Edit/Delete)
• Taxonomy/Terms (Retrieve)

6. Building App Example
• Framework = concrete5
• Library = Zend_Oauth, Zend_Http_Client

7. Demo
• Get posts from WordPress
• Get the specific post from WordPress
• Insert a new post to WordPress

8. Step by step

9. Set up the plugin
• https://github.com/WP-API/WP-API/
• https://github.com/WP-API/OAuth1/

10. Get Access Token from
WordPress
• Blog post (Japanese)
• http://notnil-creative.com/blog/archives/
3301

11. Send HTTP Request to
WordPress
$client = Loader::helper('wp_api','rest_wordpress')->getClient();
$client->setUri($wp_rest_api_url.’/posts');
$client->setMethod(Zend_Http_Client::GET);
$client->setParameterGet('filter[posts_per_page]',$num);
$client->setParameterGet(‘filter[cat]',$cat);
$client->setParameterGet('filter[orderby]','title');
$client->setParameterGet(‘filter[order]','ASC');
$response = $client->request();

12. Send HTTP Request to
WordPress
$client = Loader::helper('wp_api','rest_wordpress')->getClient();
$client->setUri($wp_rest_api_url.'/posts');
$client->setMethod(Zend_Http_Client::POST);
$data = array(
'title' => $this->post('post_title'),
'content_raw' => $this->post('post_body'),
'status' => 'publish'
);
$client->setRawData(Loader::helper('json')->encode($data),'application/
json');
$res = $client->request();

13. Easy, right?

14. • As you can see, working with JSON REST API requires
little knowledge of OAuth and building HTTP
Request…
• Use library!
JSON is a popular object type, OAuth is also popular
• Some issues…
https://github.com/WP-API/OAuth1/issues/37
https://github.com/WP-API/OAuth1/issues/34

15. Thanks!
Follow me!
!
Twitter: @HissyNC
GitHub: @hissy