} else { if ($tag == "getStudentInfo") { $student_no = $_GET['student_no']; $result = $db->getStudentById($student_no); if ($result != false) { $res["error"] = FALSE; $res['result'] = $result; echo json_encode($res); } else { $res["error"] = TRUE; $res["error_msg"] = "Failed to retrieve student details"; echo json_encode($res); } } else { if ($tag == "getStudents") { $result = $db->getStudents(); if ($result != false) { $res['error'] = false; $res['result'] = $result; echo json_encode($res); } } else { $response["error"] = TRUE; $response["error_msg"] = "Unknown tag. Use a proper tag"; echo json_encode($response); } } } } else { $response["error"] = TRUE; $response["error_msg"] = "Required parameter 'tag' is missing!";