我的页面上有以下代码

$speakersselected = get_post_meta($post->ID, 'speakersselected', true);
print_r($speakersselected); //getting output (587,585)

        $s_post = array(
          'showposts' => 80, 
          'post_type' => 'speaker',
          'post_status'  => 'publish',
          'post__in'    =>$speakersselected,
           //'post__in'    =>array($speakersselected),
            //'post__in'    => array(587,585),
           );
    
       
     echo"<pre>";
     print_r($s_post);

输出量
如果我使用'post__in' =>$speakersselected，那么我将得到以下输出

Array
(
    [showposts] => 80
    [post_type] => speaker
    [post_status] => publish
    [post__in] => 587,585
)

如果我使用'post__in' =>array($speakersselected)，则低于输出

Array
(
    [showposts] => 80
    [post_type] => speaker
    [post_status] => publish
    [post__in] => Array
        (
            [0] => 587,585
        )

)

这两种输出都对我不起作用
如果我添加静态数据'post__in' => array(587,585)，那么它对我有效

Array
(
    [showposts] => 80
    [post_type] => speaker
    [post_status] => publish
    [post__in] => Array
        (
            [0] => 587
            [1] => 585
        )

)

知道如何在post__in中发送动态数据吗？