当我向自定义帖子类型添加新条目时，会创建新类别。

现在，当我的自定义帖子类型被更改/更新时，我试图更改类别标题，但这段代码根本不起作用。还有什么我可以试试的吗？

function check_values($post_ID, $post_after, $post_before){
    $myPostAfter = $post_after;
    $myPostBefore = $post_before;


    $titleBeforeUpdateID = get_cat_ID( $myPostBefore->post_title );
    $catSlug = sanitize_title( $myPostAfter->post_title, \'\' );

    if( term_exists($myPostBefore->post_title, \'category\') ):

        wp_update_term($titleBeforeUpdateID, array(
            \'name\' => $myPostAfter->post_title,
            \'slug\' => $catSlug
        ));

    endif;

    echo \'Post ID:\';
    var_dump($post_ID);
    echo \'Post Object AFTER update:\';
    var_dump($post_after);
    echo \'Post Object BEFORE update:\';
    var_dump($post_before);
}

add_action( \'post_updated\', \'check_values\', 10, 3 );

警告：isset中的偏移量类型非法或中为空。。。\\分类法。php在线239

第239行：

/**
 * Checks that the taxonomy name exists.
 *
 * Formerly is_taxonomy(), introduced in 2.3.0.
 *
 * @since 3.0.0
 *
 * @global array $wp_taxonomies The registered taxonomies.
 *
 * @param string $taxonomy Name of taxonomy object.
 * @return bool Whether the taxonomy exists.
 */
function taxonomy_exists( $taxonomy ) {
    global $wp_taxonomies;

    return isset( $wp_taxonomies[$taxonomy] );
}