我正在从自定义元数据库获取帖子id数组。我试过了

            $urls= get_post_meta( get_the_ID(), \'videos\', false );
             foreach ( $urls as $url ) {
               foreach ( $url[\'link\'] as $u ) { 
                 $posts[] = $u;
                     }
$my_query = new WP_Query( array( \'post_type\' => \'slider\', \'post__in\' => $posts ) );

if ( $my_query->have_posts() ) {
   while ( $my_query->have_posts() ) {
        $my_query->the_post();
        the_title();
   }
}

wp_reset_postdata();
}

此循环查询选定的帖子id，但它们不是按id顺序排列的。它们是默认的ASC顺序。我尝试过的其他方法

$a=explode(" ",$u);
//$posts[]=$u;
$my_query = new WP_Query( array( \'post_type\' => \'slider\', \'post__in\' => $a ) );

这只显示数组中的最后一篇文章。在var转储上

string(2) "67" string(2) "77" //$u

$my_query = new WP_Query(
    array(
        \'post_type\' => \'slider\',
        \'post__in\' => $posts,
        \'orderby\' => \'post__in\'
    )
);