修复php版本导致的函数不兼容的bug

@@ -162,7 +162,7 @@ class UserModel
 				$product['price'] = '￥'.$val['market_price'];
 				$product['discountPrice'] = '￥'.$val['sales_price'];
 				$product['savePrice'] = ($val['market_price'] - $val['sales_price'] > 0) ? '￥'.($val['market_price'] - $val['sales_price']) : false;
-				$product['sellOut'] = boolval($val['price_down']);
+				$product['sellOut'] = (bool)($val['price_down']);
 
 				$result[] = $product;
 			}
@@ -432,7 +432,7 @@ class UserModel
 				$one['imgUrl'] = Helpers::getImageUrl($val['cover_image'], 640, 240);
 				$one['title'] = $val['filter_content'];
 				$one['content'] = $val['reply_content'];
-				$one['good'] = boolval($val['is_reliable']);
+				$one['good'] = (bool)($val['is_reliable']);
 				$one['bad'] = !$one['good'];
 
 				$result[] = $one;