这是未经测试的，但试一试。首先获取分类法中术语名称的列表。然后根据regex过滤返回的名称数组。然后将过滤后的名称数组用于WP查询。

// assumes these assignments:
//
// $taxonomy - the taxonomy name you are querying against
// $regex - the regex to match the term names against

// First get all the terms that have posts:

$terms = get_terms( array(
    \'taxonomy\' => $taxonomy,
    \'fields\' => \'names\', // return an array of term names
) );

$filtered_terms = preg_grep($regex, $terms);

// when you use this, expand $args with other relevant arguments for your query, such as post type:

$args = array(
    \'tax_query\' => array(
        array(
            \'taxonomy\' => $taxonomy,
            \'field\'    => \'name\',
            \'terms\'    => $filtered_terms,
        ),
    ),
)

$the_query = new WP_Query( $args );

// Then run your loop