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

Following what curl does internally for the request (via the method outlined in this answer to “Php – Debugging Curl”) answers the question: No.

No, it is not possible to use curl_setopt(PHP) with CURLOPT_HTTPHEADER more than once, passing it a single header each time, in order to set multiple headers.

A second call will overwrite the headers of a previous call (e.g. of the first call).

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

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

Related (but different) questions are:

  • How to send a header using a HTTP request through a curl call? (curl on the commandline)
  • How to get an option previously set with curl_setopt()? (curl PHP extension)

Leave a Comment