此代码可能正是您所追求的。这将循环页面模板以获取特色图像。如果将其添加到page.php 模板（或index.php, 根据你的主题），它应该抓取页面的特色图片，而不是帖子。

<?php
global $post;
    if ( isset($post) ) {

        //get the ancestors
        $familyTree = get_ancestors($post->ID,\'page\');
        array_unshift( $familyTree, $post->ID ); //add the current page to the beginning of the list

        //loop through the family tree until you find a result or exhaust the array
        $featuredImage = \'\';
        foreach ( $familyTree as $family_postid ) {
            if ( has_post_thumbnail( $family_postid ) ) {
                $featuredImage = get_the_post_thumbnail( $family_postid, \'full\' );
                break;
            }
        }

        // if the page has a featured image then show it
        echo ( $featuredImage ? $featuredImage : "" );

    }    
?>        

当您在博客页面上时，函数get\\u post\\u thumbnail\\u id（）返回第一篇文章的文章缩略图id（正如您已经发现的那样）。

要在博客页面上获得正确的帖子缩略图，您需要执行以下操作：

$thumbnail_id = NULL;
if(is_home()){  //blog page?
   $blog_page_id = (int)get_option(\'page_for_posts\');
   if(has_post_thumbnail($blog_page_id)){
      $thumbnail_id = get_post_thumbnail_id(get_option(\'page_for_posts\'));
   }
} elseif(is_singular()) { //everything \'single\' like post, page, custom post type...
    if(has_post_thumbnail()){
        $thumbnail_id = get_post_thumbnail_id();
    }
} else {  //everything else like 404, category archives, search etc
   //put in a fallback here
}
if(!$thumbnail_id()){
   //put another fallback here
}
$thumbnail = get_attachment_image($thumbnail_id,\'post-thumbnail\');
$thumbnail_src = wp_get_attachment_image_src($thumbnail_id,\'post-thumbnail\')[0];

首先，找到贴子页id并将id传递给wp_get_attachment_url(get_post_thumbnail_id()) 作用

$blog_page_image = wp_get_attachment_url( get_post_thumbnail_id(get_option( \'page_for_posts\' )) );