array ( 'url' => 'http://zfo.spjournals.de/gateway/document_metadata/4019_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' => 0.1529109999999999913722348310329834930598735809326171875, 'namelookup_time' => 0.151704000000000005510258915819576941430568695068359375, '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' => 151704, 'pretransfer_time_us' => 0, 'redirect_time_us' => 0, 'starttransfer_time_us' => 0, 'total_time_us' => 152911, )error occured during curl exec. Additioanl info: