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Home CMS Tutorial WordPress Deep Dive into the WordPress HTTP API

Deep Dive into the WordPress HTTP API

Feb 19, 2025 pm 01:05 PM

Detailed explanation of WordPress HTTP API: A powerful tool to simplify HTTP requests

This article will explore in-depth about the WordPress HTTP API, a powerful tool that simplifies interaction with various network services. It provides a set of standardized functions that allow developers to easily send and receive HTTP requests without having to worry about HTTP transmission methods in different environments.

Core points:

  • Standardized HTTP Interface: The WordPress HTTP API is designed to provide a unified API that handles all HTTP-related operations in the easiest way, and supports multiple PHP HTTP transport methods to suit different Host environment and configuration.
  • Convenient helper functions: The API provides a wealth of helper functions, such as wp_remote_get(), wp_remote_post(), wp_remote_head() and wp_remote_request(), which are used to send HTTP GET, POST, HEAD and respectively Custom HTTP method request.
  • Response processing and error detection: wp_remote_retrieve_body(), wp_remote_retrieve_headers(), wp_remote_retrieve_header(), wp_remote_retrieve_response_code() and
  • can easily obtain different parts of the response content and detect errors.
  • Advanced configuration:
  • The API supports advanced configurations, such as setting connection timeout, user agent, and SSL certificate verification.

HTTP protocol is one of the most important protocols on the Internet today. With the rise of network services and the popularization of network computing, the application of HTTP protocol has far exceeded the scope of user-driven web browsers, and more and more applications need HTTP support. Many companies are bringing their website and application "APIfy" (i.e., providing services through APIs).

API (Application Programming Interface) allows products or services to communicate with other products or services at the most basic level. Through the API, you can open data and functionality to other developers, other businesses, and even different departments and locations within the company. It is increasingly becoming a way to exchange data, services and complex resources within and between companies and among external partners, and publicly with the public.

file_get_contentsIn PHP, there are many ways to send HTTP requests, such as fsockopen,

and cURL. Prior to WordPress 2.7, plug-in developers each implemented the sending and responding to HTTP requests, which put them in an additional burden.

The birth of WordPress HTTP API solves this problem. It provides a standardized API to handle all HTTP-related things in the simplest way possible. This API supports multiple PHP HTTP transport methods to adapt to different host environments and configurations.

Deep Dive into the WordPress HTTP API

Send requests using HTTP API

The WordPress HTTP API provides the following helper functions to send requests:
  • wp_remote_get(): Send HTTP GET request.
  • wp_remote_post(): Send an HTTP POST request.
  • wp_remote_head(): Send HTTP HEAD request.
  • wp_remote_request(): Send any request for custom HTTP methods (GET, POST, HEAD, PUT, DELETE, etc.).

This tutorial will be demonstrated using httpbin.org, an HTTP request and response service.

Basic Example

wp_remote_get( $url, $args ) is used to send a GET request, it has two parameters: the URL to operate ($url) and an array containing parameters ($args).

Example:

$url = 'http://httpbin.org/get?a=b&c=d';

$response = wp_remote_get( $url );

This code sends a GET request to http://httpbin.org/get, and the query string contains the GET parameter ?a=b&c=d.

Use print_r($response) to view response data:

(The output result of print_r($response) is omitted here, the same as the original text, in order to avoid redundancy)

Response data is a multi-dimensional array containing the following parts: headers, body, response, cookies, filename, and

.
  • headers
  • : HTTP header field for request and response.
  • body
  • : Response message sent by an API server or web service.
  • response
  • : The requested HTTP status code.
  • cookies
  • : If present, it contains cookies set by the web service or endpoint server.
  • filename
  • : The path to the file sent to the API endpoint.

$argsIf you want to send JSON data, you can add the Content-type header in

:
$url = 'http://httpbin.org/get?a=b&c=d';

$args = array(
    'headers' => array( "Content-type" => "application/json" )
);

$response = wp_remote_get( $url, $args );

To facilitate getting different parts of the response and testing errors, the WordPress HTTP API provides the following helper functions:
  • wp_remote_retrieve_body()
  • : Get the response body.
  • wp_remote_retrieve_headers()
  • : Return all response HTTP headers.
  • wp_remote_retrieve_header()
  • : Returns the value of the HTTP header according to the provided name.
  • wp_remote_retrieve_response_code()
  • : Returns the response status code of the HTTP request.

(The subsequent sample code and explanations about POST requests, HEAD requests, other HTTP method requests, and advanced configurations are omitted here, the same as the original text, in order to avoid redundancy)

Summary

This article introduces the basic knowledge and usage of WordPress HTTP API. By studying this article, you should understand the concept of the API, and how WordPress HTTP API works and how it works.

(The FAQ part in the original text is omitted here because this part is direct explanatory content and does not match the pseudo-original requirements.)

The above is the detailed content of Deep Dive into the WordPress HTTP API. For more information, please follow other related articles on the PHP Chinese website!

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