在 WordPress 主题的帖子短代码中看不到缩略图

Question

我不明白为什么缩略图不在代码中。是 get_the_post_thumbnail('thumbnail') 不起作用。我很困惑，花了很多时间试图自己解决这个问题，但我没有看到错误。你？

function show_posts() {

$html = "";
$extra_css = "";

$latestPosts = new WP_Query('cat=5&posts_per_page=1');

if($latestPosts->have_posts()): while($latestPosts->have_posts()): 

$latestPosts->the_post();

if (has_post_thumbnail) $extra_css = "has-thumbnail";

$html = "<article class='post {$extra_css}'>";

$html .= "<div class='post-thumbnail'>";

$html .= "<a href='" . get_the_permalink() . "'>" . get_the_post_thumbnail('thumbnail') . "</a>";
	
$html .= "<div class='post-thumbnail-date'></h4>" . get_the_time('Y-m-d') . "<h4></div>";

$html .= "</div><!-- end post-thumbnail -->";

$html .= "<h3><a href='" . get_the_permalink() . "'>" . get_the_title() . "</a></h3>";

$html .= "<p class='post-info'>" . get_the_time('Y-m-d') . " | Av " . get_the_author() . "</p>";

$html .= "<p class='post-text'>" . get_the_excerpt() . "<a href='" . get_the_permalink() . "'> Läs mer...</a>"; 

$html .= "</p>";

$html .= "</article>";

endwhile;

else:

// Error message

endif;

wp_reset_postdata();

return $html;

}

Answer 1

get_the_post_thumbnail函数的第一个参数是可选的帖子ID，第二个参数是缩略图大小...

尝试使用这个：get_the_post_thumbnail(null, 'thumbnail') 或代替 null custom/global $post->ID...