php - Jet API connection problems -

so far, connecting jet.com in postman, when attempt connect via php, not errors or response. page blank. far code have:

protected static $api_user_id = "****"; protected static $api_secret = "****"; protected static $merchant_id = "****"; protected static $api_prefix = "https://merchant-api.jet.com/api/"; class jet {     public function getnewtoken()     {     $ch = curl_init($this::$api_prefix.'/token');     curl_setopt($ch, curlopt_returntransfer, 1);     //if necessary add ssl pem: curl_setopt($ch, curlopt_cainfo,'/ssl/cacert.pem');     $request = json_encode(array(         "user" => $this::$api_user_id,         "pass" => $this::$api_secret     ));                                                   curl_setopt($ch, curlopt_postfields, $request);     curl_setopt($ch, curlopt_httpheader, array(                                                                                   'content-type: application/json',                                                                                         'content-length: ' . strlen($request))                                                                            );            $data = curl_exec($ch);     curl_close($ch);     if($data = json_decode($data)){         if($token = $data->id_token){             //save $token somewhere , save last time got token             $this->settoken($token);             $this->settokents(date('r'));             $this->save();             echo $token;             return true;         }     }     return false;      $return = curl_exec($ch);        $err = curl_error($ch);      curl_close($ch);      if ($err)      {         echo "curl error #:" . $err;     }      else      {         echo $return;     }     } } $jetapi = new jet; $jetapi->getnewtoken(); 

im not sure doing wrong. appreciated. thanks.

i using:

$curl = curl_init($url); curl_setopt($curl, curlopt_post, true); curl_setopt($curl, curlopt_postfields, $obj); curl_setopt($curl, curlopt_returntransfer, true); curl_setopt($curl, curlopt_httpheader, array("content-type: $app")); curl_setopt($curl, curlopt_header, true); curl_setopt($curl, curlopt_ssl_verifypeer, false); $response = curl_exec($curl); 

the key here curl_setopt($curl, curlopt_ssl_verifypeer, false);