可以使用运行查询get_posts 要检索特定作者的帖子，并排除某些类别，然后使用count 返回帖子数量。get_posts 使用与相同的参数WP_Query, 所以你可以看看那里的参数

<?php
$args = array(
    \'author\' => 1 //ID of the author
    \'posts_per_page\' => -1, //Retrieve all posts
    \'category\' => -13, // Category to exclude, must be ID, as category is passed to WP_Query as cat
);
$posts_array = get_posts( $args );
echo count($posts_array); //Display post count