passing POST value to CURLOPT_POSTFIELDS

[cornacum]

I am running a php curl postman API in a procedural php script

curl_setopt_array($curl, array(
  CURLOPT_URL => API_SERVER.'/url/SaveUser',
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => '',
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 0,
  CURLOPT_FOLLOWLOCATION => true,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => 'POST',
  CURLOPT_POSTFIELDS =>'{"user":"user01","name":"John Doe","card":"0","password":"","privilege":"14","deviceSerial":"xxxxxxxxxxx"}',
  CURLOPT_HTTPHEADER => array(
    API_TOKEN ,
    'Content-Type: text/plain'
  ),
));

The post above works normally, but I need to POST a value into the  CURLOPT_POSTFIELDS.

I tried using variable name, but the value that is sent is the actual variable name, and not the value that the variable holds.

 
$user_id = $_POST[user_id];

CURLOPT_POSTFIELDS =>'{"user":"$user_id","name":"John Doe","card":"0","password":"","privilege":"14","deviceSerial":"xxxxxxxxxxx"}',

 

Can anyone please advise?

Many Thanks

 

[Barand]

Perhaps create an array then json_encode it

EG

$user_id = 1234;

$data = [ 'user_id' => $user_id ,
          'name' => 'John Doe' ,
          'card' => 0
        ];
        
CURLOPT_POSTFIELDS => json_encode($data),

 

[cornacum]

That works!

Thank you