顶部图片链接不存在时不添加属性进行网络请求

app/code/Sparsh/FreeShippingBar/view/frontend/templates/free_shipping_bar.phtml

@@ -28,7 +28,11 @@ endif;
         .sparsh-free-shipping-bar-goal-message{
             width: 100%;
             height: 60px;
-            background-image: url("<?= $block->getImgUrl($barData['background_img']) ?>");
+            <?php
+                if ($barData['background_img']){
+                        echo 'background-image: url("' . $block->getImgUrl($barData['background_img']) .'");';
+                    }
+            ?>
             line-height: 60px;
             background-size: 100% 100%!important;
             background-repeat: no-repeat;
@@ -36,7 +40,11 @@ endif;
 
         @media (max-width: 768px) {
             .sparsh-free-shipping-bar-goal-message{
-                background-image: url("<?= $block->getImgUrl($barData['background_img_phone']) ?>");
+            <?php
+                if ($barData['background_img_phone']){
+                        echo 'background-image: url("' . $block->getImgUrl($barData['background_img_phone']) .'");';
+                    }
+            ?>
                 width: 100%;
                 height: 40px;
                 line-height: 40px;