Error in Autodesk API call through PHP with CURL -

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i trying make call autodesk authentication api through php of curl continously getting false response. not sure wrong, can please suggest how call rest services of curl in php?

my code - 

$url = 'https://developer.api.autodesk.com/authentication/v1/authenticate';     $data = array("client_id" => $consumer_key,"client_secret" => $secret_key,"grant_type"=>$grant_type);      $ch=curl_init($url);     echo $ch;     $data_string = json_encode($data);     echo $data_string;     curl_setopt($ch, curlopt_customrequest, "post");     curl_setopt($ch,curlopt_httpheader,array('content-type'=>'application/x-www-  form-urlencoded'));     curl_setopt($ch, curlopt_postfields, array("customer"=>$data_string));     $result = curl_exec($ch);     curl_close($ch);     $data_return=array("result"=> $result);     echo json_encode($data_return);

output -

{"result":false}

i checked information curl_getinfo , like- array ( 'url' => 'https://developer.api.autodesk.com/authentication/v1/authenticate', 'content_type' => null, 'http_code' => 0, 'header_size' => 0, 'request_size' => 0, 'filetime' => -1, 'ssl_verify_result' => 0, 'redirect_count' => 0, 'total_time' => 0.34300000000000003, 'namelookup_time' => 0, 'connect_time' => 0.23400000000000001, 'pretransfer_time' => 0, 'size_upload' => 0, 'size_download' => 0, 'speed_download' => 0, 'speed_upload' => 0, 'download_content_length' => -1, 'upload_content_length' => -1, 'starttransfer_time' => 0, 'redirect_time' => 0, 'redirect_url' => '', 'primary_ip' => '52.26.41.203', 'certinfo' => array ( ), 'primary_port' => 443, 'local_ip' => '192.168.1.106', 'local_port' => 62792, )

in reponse showing "protocol.http.badformdata" error.

try adding:

curl_setopt($ch, curlopt_returntransfer, true);

this tells curl return transfer string of return value of curl_exec() instead of outputting out directly. can read more curl options here.


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