curltest.php

$postBody = [
  'test' => 'test'
];

$baseUrl = 'http://localhost:4000';

$ch = curl_init();
curl_setopt($ch, CURLINFO_HEADER_OUT, TRUE);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_HEADER, TRUE);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
curl_setopt($ch, CURLOPT_URL, $baseUrl);
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($postBody));
//curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_NTLM);
//curl_setopt($ch, CURLOPT_USERPWD, $userpwd);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
        'Content-Type: application/json'
));

$result = curl_exec($ch);