如果我想知道10个不同标签中总共有多少帖子，我该怎么写？

如果你是指职位总数的总和，即count 每个术语的值，然后：

是的，您可以将slug列表放入一个数组中，并循环遍历各个项目，以手动求和总计：

$term_slugs = [ \'slug\', \'slug-2\', \'etc\' ];
$post_count = 0;

foreach ( $term_slugs as $slug ) {
    $term = get_term_by( \'slug\', $slug, \'post_tag\' );
    $post_count += $term->count;

    // This is just for testing.
    echo $term->name . \': \' . $term->count . \'<br>\';
}

echo \'Grand total posts: \' . $post_count;

$term_slugs = [ \'slug\', \'slug-2\', \'etc\' ];
$terms = get_terms( [
    \'taxonomy\' => \'post_tag\',
    \'slug\'     => $term_slugs,
] );
/* Or with get_tags():
$terms = get_tags( [ \'slug\' => $term_slugs ] );
*/

$post_count = array_sum( wp_list_pluck( $terms, \'count\' ) );
echo \'Grand total posts: \' . $post_count;