修复上传图片方法explode函数报错

vendor/antgoods/goods/src/controllers/GoodsController.php

@@ -85,7 +85,7 @@ class GoodsController extends Controller
             $file_id_str = $model->imageId;
             $model->save();
             $goods_manager = new GoodsManager();
-            $save_file_res = $goods_manager->saveFile(explode($file_id_str), $model);
+            $save_file_res = $goods_manager->saveFile(explode(',', $file_id_str), $model);
             if($save_file_res['status']){
                 $model->image = $save_file_res['first_file_id'];
                 $model->save();
@@ -115,7 +115,7 @@ class GoodsController extends Controller
             $file_id_str = $model->imageId;
             $model->save();
             $goods_manager = new GoodsManager();
-            $save_file_res = $goods_manager->saveFile(explode($file_id_str), $model, $old_id_arr);
+            $save_file_res = $goods_manager->saveFile(explode(',', $file_id_str), $model, $old_id_arr);
             if($save_file_res['status']){
                 $model->image = $save_file_res['first_file_id'];
                 $model->save();