ussd-app.php

<?php 

$ussdRequest = json_decode(@file_get_contents('php://input')); 

if($ussdRequest != NULL);

$ussdResponse = new stdClass; 

	switch($ussdRequest->Type){
	case "Initiation":
	   
		$ussdResponse->Message = "Hello, thank you very much for contributing this NHIS Survey. Are you a registered member? \n 1.Yes \n 2.No"; 
		$ussdResponse->Type = "Response";
		$ussdResponse->ClientState = $ussdRequest->Message;
		break;

	case "Response":
		switch($ussdRequest->Sequence){
		case 2:
				if($ussdRequest->Message == "1"){
					$ussdResponse->Message = "Rate the quality of service you receive from the scheme. From a scale of 1 to 5.\n1.Very low \n2.Low \n3.High \n4.Very High \n5.Excellent";
						$ussdResponse->Type = "Response";
				}elseif ($ussdRequest->Message == "2"){
					$ussdResponse->Message = "Please can you provide the reason why you're not registered? \n1.Too expensive \n1.Too Expensive \n2.Innefficient Management of Scheme \n3.Low Quality Service \n4.Difficult Registration. \n5.Other";
					$ussdResponse->Type = "Response";
				}else{
					$ussdResponse->Message = "Invalid Response";
					$ussdResponse->Type = "Release";
				}
			
				break;
		}
	
	}

	echo json_encode($ussdResponse);