The WordPress REST API: The Definitive Guide 2847 Views Mar 15, 2021
Supporting about 40% of websites on the internet, WordPress has been in the marketing industry for quite a while now. The reason behind its popularity is the way it manages the content for different businesses. It is simple and reliable which is why many users either build websites on their own or hire WordPress developers for the same. But for longer life, tools need to come up with new updates and offer new ways for users and developers to be interactive with their content.
WordPress REST API provides an entirely new admin experience for WordPress by allowing you to create plugins like – building an interactive GUI, or bringing your WordPress content into completely separate applications.
What is REST API?
It provides data access to the site’s content. REST API makes public content accessible to the public whereas, the private content is password-protected available only for internal users
It’s the backbone of the WordPress Block Editor, and it can also help your theme, plugin, or custom application to provide new, immersive, and interactive interfaces for managing and publishing website content.
How does a WordPress API work?
Right now, there are several different types of Application Programming Interfaces (APIs), but REST stands out by not being a mainstream option. It works by transferring textual data from one location to another without bringing a database or user interface directly into the picture.
GET: This command asks the server for a resource (such as a particular piece of data).
POST: The client sends a request to the server to add a resource.
PUT: This helps you to modify or upgrade an existing resource on the server.
DELETE This command, as the name indicates, deletes a resource from the server.
Along with these instructions, the client will send information specifying which resource is needed and how it should be used.
How is it beneficial to Developers?
Developers are no longer restricted to PHP and can use WordPress to manage data through REST API. WordPress REST API enables WordPress to share data with other websites and applications written in any programming language.
The REST API optimizes how applications communicate with WordPress data, making WordPress creation easier and more effective.
How to start using WordPress REST API?
Let’s see how to start using the WordPress REST API in 3 steps :
Step 1: Access the REST API
Any application that accepts HTTP endpoints can ‘access’ the WordPress REST API. For example, if you type the following command into your browser, you’ll get a JSON-formatted list of your WordPress posts:
You must substitute the default URL with the address of your website. For a REST API request to work, you’ll also need WordPress version 4.4 or higher.
A browser, on the other hand, isn’t the best tool for experimenting with the REST API. Instead, we recommend using the command line, which allows for more flexibility.
Step 2: Locate a Specific Post Making use of the REST API
The previous command should have returned a list of all your WordPress entries, complete with post IDs. You’d use an endpoint like this to get a particular post based on its ID:
This is perfect for displaying a specific post translated into a mobile app. The WordPress REST API, on the other hand, allows you to retrieve any type of data from WordPress, making its practical applications extremely versatile. Instead of simply fetching a message, you might use the REST API to add metadata to it. In other words, instead of using the GET form, you’ll use the POST method.
Step 3: Adding Metadata to a Particular Post
Let’s say you’ve already been authenticated, now you can add new data to any of your posts with a request similar to the one presented in the previous section, but this time using POST instead of GET:
For example, if you want to add metadata to a template that can be used to construct a rich sample, your request could look like this:
Decide how much metadata you want to include and then define it using JSON objects, which is a much more organized approach. In any case, once you understand what the most common endpoints are and how to use them, a whole new world of possibilities becomes possible.
Endpoints may be added to WordPress.
Custom routes and endpoints are provided by the WordPress REST API. If you wish to create another WordPress site and merge the two, these are helpful.
In the REST API, routes may have an infinite number of endpoints. For each endpoint, you can define HTTP methods, callback functions, and permissions, as well as default values and several other parameters.
Conclusion:- REST API integration to WordPress core has been around for many years now. If you’re planning to build a WordPress website, lots of learnings are going to come the way that will improve your skills and help you to develop apps using WordPress development services.
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