What is the significance of using CURLOPT_COOKIEJAR in cURL for managing cookies in PHP?

When making HTTP requests in PHP using cURL, it is important to manage cookies to maintain session information across requests. The CURLOPT_COOKIEJAR option in cURL allows you to specify a file where the received cookies will be stored, and later sent back in subsequent requests using CURLOPT_COOKIEFILE. This helps in maintaining session state and authentication information between requests.

// Initialize cURL session
$ch = curl_init();

// Set the URL to make the request to
curl_setopt($ch, CURLOPT_URL, 'https://example.com/api');

// Enable cookie handling
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');

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

// Close cURL session
curl_close($ch);

// Process the response
echo $response;