How to use cURL in Magento 2

cURL (client URL) is used to call third-party API data on your website. As a good Magento developer, you should avoid PHP default cURL in your Magento 2 website. Magento provides a cURL class to transmit HTTP requests and receive responses from third-party services. The Magento class for cURL is Magento\Framework\HTTP\Client\Curl

Magento 2 cURL POST Example

<?php
namespace Dhairvi\Demo\Helper;

/**
 * Class Data
 */ 
class Data extends \Magento\Framework\App\Helper\AbstractHelper
{
 
	/**
	 * @var \Magento\Framework\HTTP\Client\Curl
	 */
	protected $curl;
	
	/**
	 * @param \Magento\Framework\App\Helper\Context $context
	 * @param \Magento\Framework\HTTP\Client\Curl $curl
 	 */
	public function __construct(
	  \Magento\Framework\App\Helper\Context $context,
	  \Magento\Framework\HTTP\Client\Curl $curl
	) {
	  parent::__construct($context);
	  $this->curl = $curl;
	}
	
	public function postExample()
	{
		$header = ["Content-Type" => "application/json", "Content-Length" => "200"];
		$this->curl->setHeaders($header);
		
		$this->curl->setOption(CURLOPT_RETURNTRANSFER, true);
		$this->curl->setOption(CURLOPT_PORT, 8080);
		$this->curl->setOption(CURLOPT_TIMEOUT, 0);
		
		$request = [
			'data_1' => 'value_1',
			'data_2' => 'value_2',
			'data_3' => 'value_3',
			'data_4' => 'value_4',
			'data_5' => 'value_5',
		];
		$requestJsonData = json_encode($request);
		
		$url = 'POST_URL';
		$this->curl->post($url, $requestJsonData);
		
		$result = $this->curl->getBody();
		
		return $result;
	}
}

Similar to the POST, you can implement GET; the following is a quick example of a GET request.

$this->curl->get($url);

$result = $this->curl->getBody();