未定义的索引：第257行中的category_icon_code

Question

您好我收到了通知未定义索引：行号257。 请帮忙。 这是第257行的代码。

$my_query = new wp_query( $args );
            while( $my_query->have_posts() ) {
                $my_query->the_post();
                global $postID;
                $current++;
                $category = get_the_category();
                $tag = get_cat_ID( $category[0]->name );
                $tag_extra_fields = get_option(MY_CATEGORY_FIELDS);
                if (isset($tag_extra_fields[$tag])) {
                    $category_icon_code = $tag_extra_fields[$tag]['category_icon_code']; 
                    $category_icon_color = $tag_extra_fields[$tag]['category_icon_color'];
                    $your_image_url = $tag_extra_fields[$tag]['your_image_url'];
                }
                if (empty($category_icon_code) || empty($category_icon_color) || empty($your_image_url)) {

                        $tag = $category[0]->category_parent;

                        $tag_extra_fields = get_option(MY_CATEGORY_FIELDS);
                        if (isset($tag_extra_fields[$tag])) {
                            if (empty($category_icon_code)){
                                $category_icon_code = $tag_extra_fields[$tag]['category_icon_code'];
                            }
                            if (empty($category_icon_color)){
                                $category_icon_color = $tag_extra_fields[$tag]['category_icon_color'];
                            }
                            if (empty($your_image_url)){
                                $your_image_url = $tag_extra_fields[$tag]['your_image_url'];
                            }
                        }

                    }
            ?>

我为这些获得了未定义的索引。

$category_icon_code
$category_icon_color
$your_image_url

提前致谢。

Answer 1

在variables循环之前将这些while设置为默认值为空：

$category_icon_code = "";
$category_icon_color = "";
$your_image_url = "";