CURL is a library and a set of functions that allows you to make requests to URLs using various protocols like HTTP, HTTPS, FTP, etc.It provides a way to communicate with web servers and retrieve or send data.

Example:

<?php
// Initialize cURL session
$ch = curl_init();

// Set the URL to fetch
curl_setopt($ch, CURLOPT_URL, 'http://example.com/api');

// Execute the request and fetch the response
$response = curl_exec($ch);

// Close cURL session
curl_close($ch);

// Process the response
echo $response;
?>

• curl_init() starts a new cURL session.
• curl_setopt() sets options for the cURL session, such as the URL to fetch.
• curl_exec() executes the cURL request and gets the response.
• curl_close() closes the cURL session when done.

you can use cURL to fetch data from other servers and work with it in your PHP applications.