在帖子标题前显示特色图片

Question

我一直在尝试在发布内容之前显示特色图片。我是 php 新手，这是我的代码：

function featured_image_before_title($title, $id) { 
 if (get_post_type($id) === 'post') {
        $featuredimage = get_the_post_thumbnail();
        $title = $featuredimage . $title;
        }
    return $title;
}

add_filter( 'the_title', 'featured_image_before_title', 10,2 );

以上内容在前端有效，但是当我转到 Admin > Posts > All posts 时，Title 列会在实际帖子标题之前显示一堆 html 标记。

html 标记是缩略图大小，如下所示：

<img width="1280" height="150" src="http://example.com/wp-content/uploads/image.jpg" class="attachment-post-thumbnail size-post-thumbnail wp-post-image" alt="" srcset="https://example.com/wp-content/uploads/image.jpg 1280w, https://example.com/wp-content/uploads/image-300x83.jpg 300w, https://example.com/wp-content/uploads/image-1024x284.jpg 1024w, https://example.com/wp-content/uploads/image-768x213.jpg 768w, https://example.com/wp-content/uploads/image-1080x300.jpg 1080w, https://example.com/wp-content/uploads/image-1280x356.jpg 1280w, https://example.com/wp-content/uploads/image-980x272.jpg 980w, https://example.com/wp-content/uploads/image-480x133.jpg 480w, https://example.com/wp-content/uploads/image-600x167.jpg 600w" sizes="(max-width: 1280px) 100vw, 1280px" /> POST TITLE 

如何在帖子标题前插入特色图片？

Answer 1

你必须使用is_admin()。试试下面的代码。

function featured_image_before_title($title, $id) { 

    if( is_admin() )
        return $title;

    if ( get_post_type( $id ) === 'post') {
        $featuredimage = get_the_post_thumbnail();
        $title = $featuredimage . $title;
    }
    return $title;
}
add_filter( 'the_title', 'featured_image_before_title', 10, 2 );