//Logout.php
<?php
$sessionID = $_POST["sessionID"];
//$user = $_POST["user"]; //curling user & sessionID for backend to remove
//$pass=$_POST["pass"];
$logout=1; //as well as logoutflag, if logout flag = 1, sessionID will be removed
$backendcurl = curl_init();
//$studentinfo = array('pass'=> $_POST['pass'], 'user' => $_POST['user']);
$Backendurl = "http://afsaccess1.njit.edu/~rap86/backAuth.php";
curl_setopt($backendcurl, CURLOPT_URL, $Backendurl);
curl_setopt($backendcurl, CURLOPT_POST, 1);
curl_setopt($backendcurl, CURLOPT_POSTFIELDS, "sessionID=".$sessionID."&logout=".$logout); //post info to backend to confirm if valid
curl_setopt($backendcurl, CURLOPT_RETURNTRANSFER, true);
$backendreturn = curl_exec($backendcurl);
curl_close($backendcurl);
echo $backendreturn;
?>

//MidCurlRegistrar.php
<?php
$data = $_POST['data'];
$decode = json_decode($data);
$curlId = $decode->curlid;

//Start POST for Question
$curlInit = curl_init();
$post = [ 'data' => $data ];

//init
$url = "";
$message = "";

//null check
if(is_null($data))   { $message .= "Data is Not Defined \n"; }
if(is_null($curlId))   { $message .= "CurlId is Not Defined \n"; $curlId=""; }

//curl options
curl_setopt($curlInit, CURLOPT_POST, 1);
curl_setopt($curlInit, CURLOPT_RETURNTRANSFER, true);

switch ($curlId) {
	case "getquestion":
    $message .= "GETQUESTION - MID Curl \n";
    $url = "http://afsaccess1.njit.edu/~rap86/backCurlRegistrarCopy.php";
		break;
	case "gettest":
    $message .= "GETTEST - MID Curl \n";
		$url = "http://afsaccess1.njit.edu/~rap86/backCurlRegistrarCopy.php";
		break;
	case "modtest":
    $message .= "MODTEST - MID Curl \n";
		$url = "http://afsaccess1.njit.edu/~rap86/backCurlRegistrarCopy.php";
		break;
	case "updatetest":
    $message .= "UPDATETEST - MID Curl \n";
		$url = "http://afsaccess1.njit.edu/~rap86/backCurlRegistrarCopy.php";
		break;
	case "createtest":
    $message .= "CREATETEST - MID Curl \n";
		$url = "http://afsaccess1.njit.edu/~rap86/backCurlRegistrarCopy.php";
		break;
	case "createquestion":
    $message .= "CREATEQUESTION - MID Curl \n";
    $url = "http://afsaccess1.njit.edu/~rap86/backCurlRegistrarCopy.php";
		break;
	case "updatefeedback":
    $message .= "UPDATEFEEDBACK - MID Curl \n";
		$url = "http://afsaccess1.njit.edu/~rap86/backCurlRegistrarCopy.php";
		break;
	default:
		$message .= "Invalid/Unsupported Curl \n";
		break;
}
//curl fill-in options
curl_setopt($curlInit, CURLOPT_URL, $url);
curl_setopt($curlInit, CURLOPT_POSTFIELDS, http_build_query($post));

//json test function
function isJson($string){
	return is_string($string) && is_array(json_decode($string, true)) && (json_last_error() == JSON_ERROR_NONE) ? true : false;
}
//execute curl
$response = curl_exec($curlInit);
curl_close($curlInit);
if(isset($response)){
  if(isJson($response)){
  	$decode2 = json_decode($response);
  	$decode2->middebugmessage = $message;
  	echo json_encode($decode2);
  }
  else{
	  echo "\n Middle Debug: \n".$message."\n Back End Response: \n".$response;
  }
}
else{
  echo "No Curls Executed \n".$message;
}

?>