public function deleteById($id) { $selectId = filter_var($id, FILTER_SANITIZE_NUMBER_INT); $calories = new Calories(); $foodExistsInCaloriesList = $calories->foodExistsInCaloriesList($selectId); if ($foodExistsInCaloriesList) { return array("success" => false); } else { $result = SQL::query("DELETE FROM foods WHERE id = " . $selectId . ";"); return array("success" => $result); } }