What are common pitfalls when using cURL in PHP for sending and receiving XML data?

One common pitfall when using cURL in PHP for sending and receiving XML data is not setting the appropriate headers for the request and response. To ensure that the XML data is properly sent and received, you should set the Content-Type header to "application/xml" for sending XML data and parse the response as XML using simplexml_load_string().

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

// Set cURL options
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $xml_data);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/xml'));

// Execute cURL session
$response = curl_exec($ch);

// Close cURL session
curl_close($ch);

// Parse XML response
$xml_response = simplexml_load_string($response);

// Use $xml_response as needed