array (
  'url' => 'http://zfo.spjournals.de/gateway/articles/236_12?accessToken=JH8DFG6745DBMKE931Z7UJ6Z',
  'content_type' => NULL,
  'http_code' => 0,
  'header_size' => 0,
  'request_size' => 0,
  'filetime' => -1,
  'ssl_verify_result' => 0,
  'redirect_count' => 0,
  'total_time' => 0.454664000000000012580159136632573790848255157470703125,
  'namelookup_time' => 0.454591000000000022840396241008420474827289581298828125,
  'connect_time' => 0.0,
  'pretransfer_time' => 0.0,
  'size_upload' => 0.0,
  'size_download' => 0.0,
  'speed_download' => 0.0,
  'speed_upload' => 0.0,
  'download_content_length' => -1.0,
  'upload_content_length' => -1.0,
  'starttransfer_time' => 0.0,
  'redirect_time' => 0.0,
  'redirect_url' => '',
  'primary_ip' => '',
  'certinfo' => 
  array (
  ),
  'primary_port' => 0,
  'local_ip' => '',
  'local_port' => 0,
  'http_version' => 0,
  'protocol' => 0,
  'ssl_verifyresult' => 0,
  'scheme' => '',
  'appconnect_time_us' => 0,
  'connect_time_us' => 0,
  'namelookup_time_us' => 454591,
  'pretransfer_time_us' => 0,
  'redirect_time_us' => 0,
  'starttransfer_time_us' => 0,
  'total_time_us' => 454664,
)error occured during curl exec. Additioanl info: