PHP/WordPress API Call with cURL: Complete Guide

In today’s digital age, APIs (Application Programming Interfaces) play a pivotal role in connecting and interacting with various web services. One of the most versatile and widely used methods to make API calls is by utilizing the powerful CURL library in PHP, which is also commonly employed in the context of WordPress. This article will provide you with a step-by-step guide on how to perform API calls using CURL in PHP and WordPress, enabling you to harness the full potential of external data and services seamlessly.

Introduction to API Calls and CURL

APIs serve as intermediaries that allow different software systems to communicate with each other. CURL, short for Client URL, is a command-line tool and library that enables data transfer through various protocols. In PHP, CURL provides a convenient way to make HTTP requests to APIs, making it an essential tool for developers.

Types of Methods

  • POST : To create a New Request
  • GET : To Retrieve a Request
  • DELETE : To Remove a Request
  • PATCH : To Update Partial an Existing Request
  • PUT : To Update a Request

As of now PHP has introduce new concept to call any API in our web application. Using those function we can easily call API.

What is CURL ?
Curl stands for Client URL is PHP library that allows the user to create an HTTP request and allows to send and retrieve data from an URL to our Application.
Create a file name called test-curl.php inside your project directory and paste code into it.

Implementing API CURL in PHP

$url ="";
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, false);

Implement API Curl in WordPress

WordPress, a popular content management system, can also benefit from CURL-powered API calls. By creating custom functions, you can seamlessly integrate external data into your WordPress site.

function fetch_api_data() {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, '');
    $response = curl_exec($curl);
    // Process the response and return data
    return json_decode($response, true);

Best Practices for Optimized API Calls

To ensure efficient and optimized API calls, consider implementing caching mechanisms, adhering to rate limits, and monitoring API usage.


In this comprehensive guide, we’ve explored the world of API calls using CURL in PHP and WordPress. You’ve learned how to set up your environment, make basic and advanced API requests, handle errors, and integrate API calls within WordPress. By mastering these techniques, you can unlock a world of possibilities for data integration and enrichment in your web applications.