WordPress：functions.php 中的 WP_Query 返回空查询（对于自定义短代码）

Question

我正在为子主题编写一个自定义短代码，我已将其放入子主题functions.php中。这是代码：

function get_featured_video(){
$video_query = new WP_Query('category_name=videos&order=ASC');
$videoPath = "/";
$videoText =  "";
while ($video_query->have_posts()){
    $video_query->the_post();
    $featured = get_post_meta($post->ID, "vid_feature", $single = true);
    if(strtolower($featured)=='yes'){
        $videoPath = get_permalink($post->ID);
        $content = strip_tags($post->post_content);
        $contentArr = str_word_count($content,1);
        if(count($contentArr>50)){
            $videoText = join(" ",array_slice($contentArr,0,50));
            $videoText .= " <a href='$link'>&lt;read more&gt;</a>";
        } else {
            $videoText = $content;
        }
        break;
    }
}
$returnStr = "<h1><a href='$videoPath'>You've Got to See This!</a></h1>\n";
$returnStr .= $videoText;
return $returnStr;
}

add_shortcode('getfeaturedvideo','get_featured_video');

我遇到的问题是它返回一个空白查询。我知道视频类别中有一个帖子。我从未在functions.php中使用过WP_Query。我需要使用其他方法吗？

Answer 1

在函数的顶部尝试声明：

global $post;