POST Multiple POST Values

  //Setup the POST fields
  $PostData = array(
    'my_field1' => $my_field1,
    'my_field1' => $my_field1
  );
  $PostData = http_build_query($PostData);
  
  $SendUrl = 'https://urltosendto.com';
  
  $Response = '';
  if(function_exists('curl_init') && function_exists('curl_setopt') && function_exists('curl_exec'))
  {
    $ch =  curl_init();
    curl_setopt($ch, CURLOPT_URL, $SendUrl);
    curl_setopt($ch, CURLOPT_POST, True);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $PostData);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);        //Connect timeout in secs
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);               //Maximum time the request is allowed to take in secs
    $Response = curl_exec($ch);
    $HttpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);

    if ($HttpCode !== 200)
      die("Curl request failed, HTTP status code: $HttpCode");
 
   //echo($Response);
    if (strpos($Response, 'SUCCESS') !== False)
    {
      //It worked
      //echo"[Success]";
    }
  }

POST a json based request

  $PostData = array(
    'SomeField1' => $MyVariable,
    'SomeField1' => 1
  );
  $PostData = json_encode($PostData);

  $Url = "https://myurl.com";
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $Url);
  curl_setopt($ch, CURLOPT_POST, true);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));   //<<<You can add header fields in here. e.g.: curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', "Token:$MyAcccessToken"));
  curl_setopt($ch, CURLOPT_POSTFIELDS, $PostData);
  curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); 		//Follow any page redirects etc (optional)
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);				//<<<Include this for the output of curl to go to the curl_exec() output below instead of the browser screen
  curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);			  //Connect timeout in secs
  curl_setopt($ch, CURLOPT_TIMEOUT, 10);				      //Maximum time the request is allowed to take in secs
  $CurlResult = curl_exec($ch);
  $HttpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
  curl_close($ch);

  if ($HttpCode !== 200)
    die("Curl request failed, HTTP status code: $HttpCode");

  $DecodedJson = json_decode($CurlResult, True);
  
  echo "CurlResult: ";
  print_r($CurlResult);
  echo "<br>DecodedJson: ";
  print_r($DecodedJson);
  
  if (!is_null($DecodedJson))
  {
    //Check for succcess
    if ( (isset($DecodedJson['errorCode'])) && ($DecodedJson['errorCode'] == 0) )
    {
    }
  }

POST a json block with authorisation

  $PostData = array(
    'SomeField1' => $MyVariable,
    'SomeField1' => 1
  );
  $PostData = json_encode($PostData);
  
  $SendUrl = 'https://urltosendto.com';
  $Username = 'myusername';
  $Password = 'mypassword';
  
  if(function_exists('curl_init') && function_exists('curl_setopt') && function_exists('curl_exec'))
  {
    $ch =  curl_init();
    curl_setopt($ch, CURLOPT_URL, $SendUrl);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $PostData);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
    curl_setopt($ch, CURLOPT_TIMEOUT, 10);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Authorization: Basic ' . base64_encode("$Username:$Password"), 'Content-Type: application/json'));
    $Response = curl_exec($ch);
    $HttpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    curl_close($ch);
  }

  if ($HttpCode !== 200)
    die("Curl request failed, HTTP status code: $HttpCode");

  //response_code":"SUCCESS"
  $Response = json_decode($Response, TRUE);
  $response_code = $Response['response_code'];
  
  if ($response_code == "SUCCESS")
  {
    
  }

Add header fields

  curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
  //For multiple entires use this instead:
  curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json', "Token:$MyAcccessToken"));