echo json_encode($result);
exit;
case "getCategories":
$result = DbManager::getCategories();
echo json_encode($result);
exit;
case "getSubCategory":
$result = DbManager::getSubCategory($request->data);
echo json_encode($result);
exit;
case "addSubCategory":
$result = DbManager::addSubCategory($request->data);
echo json_encode($result);
exit;
case "getSubCategories":
$result = DbManager::getSubCategories();
echo json_encode($result);
exit;
case "editCategoryTitle":
$result = DbManager::editCategoryTitle($request->data);
echo json_encode($result);
exit;
case "deleteCategory":
$result = DbManager::deleteCategory($request->data);
echo json_encode($result);
exit;
case "deleteSubCategory":
$result = DbManager::deleteSubCategory($request->data);
echo json_encode($result);
exit;
case "editMiniProject":
