php - Can I call curl_setopt with CURLOPT_HTTPHEADER multiple times to set multiple headers?

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Can I call href="http://php.net/curl_setopt">curl_setopt with
CURLOPT_HTTPHEADER multiple times to set multiple
headers?

$url =
            'http://www.example.com/';


$curlHandle =
            curl_init($url);
curl_setopt($curlHandle, CURLOPT_HTTPHEADER,
            array('Content-type: application/xml'));
curl_setopt($curlHandle,
            CURLOPT_HTTPHEADER, array('Authorization: gfhjui'));

$execResult =
            curl_exec($curlHandle);

Answer

Following what curl does internally for the
request (via the method outlined in href="https://stackoverflow.com/a/14436877/367456">this answer to "Php -
Debugging Curl") answers the question: No, it is not possible to
use the curl_setopt call with
CURLOPT_HTTPHEADER. The second call will overwrite the headers
of the first call.

Instead the function needs to
be called once with all
headers:

$headers =
            array(
 'Content-type: application/xml',
 'Authorization:
            gfhjui',
);
curl_setopt($curlHandle, CURLOPT_HTTPHEADER,
            $headers);

Related
(but different) questions are: