2019-07-22 08:32
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没有得到预期的PHP cURL响应

I have the following PHP code:

$data = array("client_id" => "sipgate-app-web", "grant_type" => "password", "username" => "my_username", "password" => "my_password");
$data_string = json_encode($data);

$ch = curl_init('https://api.sipgate.com/login/sipgate-apps/protocol/openid-connect/token');
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_POSTFIELDS, $data_string);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
'Content-Type: application/x-www-form-urlencoded',
'Accept: application/json'

$result = curl_exec($ch);

echo $result;

Unfortunately, I'm not getting the expected response. The response I'm receiving is:

{"error":"invalid_request","error_description":"Missing form parameter: grant_type"}

When using an online cURL tool like https://onlinecurl.com with the same data (URL, header, data) as in my cURL PHP code, I'm getting the right response. This means, there's something wrong with my PHP code. I'm not getting any error in the PHP error log.

The manual says I have to use the following cURL code:

 curl \
--request POST \
--header 'Content-Type: application/x-www-form-urlencoded' \
--header 'Accept: application/json' \
--data-urlencode "client_id=sipgate-app-web" \
--data-urlencode "grant_type=password" \
--data-urlencode "username=my_username" \
--data-urlencode "password=my_password" \

Since I'm new to cURL, after googling a lot, I have no idea what I'm doing wrong.

Can anybody help me?

EDIT: You can test my PHP code above as it is. You should get the following response, if the code is working:

{"error":"invalid_grant","error_description":"Invalid user credentials"}

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