Issuing with making a post request with php curl - php

Question

I'm trying to make a post request with php using curl however the json is not getting delivered to the REST API. Here is my code. In the webservice all I get is null value. I'm not sure where I'm going wrong.
$email_json_data = json_encode($email_data);
$header[] = "Content-type: application/json";
$ch = curl_init($api_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $email_json_data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
return $response;
Webservice code:
$email_json_data = $this->post('email_json_data');
$email_data = json_decode($email_json_data);

Answer 1

Check PHP: curl_errno
There's probably a problem connecting to the server, and it's probably in one of your $header. To find out more, you need to show (in production, LOG it) the curl error.
In the future, please try to include a complete code sample, rather than just snippets
Code added from PHP: curl_strerror
class CurlAdapter
{
private $api_url = 'www.somewhere.com/api/server.php';
private $error = "";
private function jsonPost($data)
{
// init curl
$ch = curl_init($this->api_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
// curl header
$header[] = "Content-type: application/json";
curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
// build post data
$post_data = json_encode($data);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
// execute
if (empty($response = curl_exec($ch)) {
// Check for errors and display the error message
if($errno = curl_errno($ch)) {
$error_message = curl_strerror($errno);
$this->error = "cURL error ({$errno}):\n {$error_message}";
// #todo log curl error
}
}
// Close the handle
curl_close($ch);
return $response;
}
public function post( mixed $data )
{
if (empty($this->jsonPost($data))) {
return $this->error;
}
return $response;
}
}
$ca = new CurlAdapter();
echo $ca->post(['data' => 'testdata']);

Answer 2

Figured out a way to make this work.
Replaced $email_json_data = $this->post('email_json_data');
with $email_json_data = file_get_contents("php://input");