此方法使用计数器和1个查询。每个帖子类型只能显示3篇帖子。

$args = array(
        \'post_type\' =>  array( \'type1\', \'type2\', \'type3\' ),
        \'posts_per_page\'    =>  -1
        );

    $myquery = new WP_Query( $args );
        $type1 = 0; $type2 = 0; $type3 = 0; $count = 0;
        while ( $myquery->have_posts() ) : $myquery->the_post();

            if ( $post->post_type == \'type1\' ) $type1++; 
            if ( $post->post_type == \'type1\' && $type1 > 3 ) continue;

            if ( $post->post_type == \'type2\' ) $type2++; 
            if ( $post->post_type == \'type2\' && $type2 > 3 ) continue;

            if ( $post->post_type == \'type3\' ) $type3++; 
            if ( $post->post_type == \'type3\' && $type3 > 3 ) continue;

            $count++; if ( $count > 9 ) continue;

            // Do Stuff

            endwhile;