php curl: SSL_VERIFYPEER option doesn't have effect
Add the option CURLOPT_SSL_VERIFYHOST
curl_setopt($process, CURLOPT_SSL_VERIFYHOST, FALSE);
I realized, that the english version of the PHP documentation missing this important information:
(translated from the german version of the PHP manual)
CURLOPT_SSL_VERIFYHOST has to be set to true or false if CURLOPT_SSL_VERIFYPEER has been deactivated.