在中插入以下代码functions.php 您的孩子主题。

function wpse_excerpt_for_specific_category( $excerpt ) {
    global $post;
    $category = \'Test\'; // could be name, slug, or id
    $excerpt_text = \'some arbitrary text\';
    if( \'post\' == $post->post_type && \'publish\' == $post->post_status && in_category( $category ) ) {
        $excerpt = $excerpt_text;
    }
    return $excerpt;
}
add_filter( \'get_the_excerpt\', \'wpse_excerpt_for_specific_category\' );