// getting all possible and valid action URL
$possible_url = array("get_casetype", "get_all_doctor", "get_doctor_info", "get_all_patient", "get_patient_dtl", "get_appt_lst", "get_appt_dtl", "save_appt_dtl", "upd_appt_dtl", "get_all_calendar", "appt_cleanup");
$value = "An error has occurred getting JSON value.";
if (isset($_GET["action"]) && in_array($_GET["action"], $possible_url)) {
switch ($_GET["action"]) {
case "get_all_doctor":
$DoctorModel = new DoctorModel($conn);
$value = $DoctorModel->get_all_doctor($_GET["term"]);
break;
case "get_doctor_info":
$DoctorModel = new DoctorModel($conn);
$value = $DoctorModel->get_doctor_info($_GET["id"]);
break;
case "get_casetype":
$DoctorModel = new DoctorModel($conn);
$value = $DoctorModel->get_casetype($_GET["id"]);
break;
case "get_all_patient":
$PatientModel = new PatientModel($conn);
$value = $PatientModel->get_all_patient($_GET["typ"], $_GET["term"]);
break;
case "get_patient_dtl":
$PatientModel = new PatientModel($conn);
$value = $PatientModel->get_patient_dtl($_GET["patid"]);
break;
case "appt_cleanup":
$CalendarModel = new CalendarModel($conn);
$value = $CalendarModel->appt_cleanup();
break;
case "get_appt_lst":
$ApptModel = new ApptModel($conn);
