在我的插件文件中，我试图将内容添加到编辑自定义帖子类型的自定义分类法的屏幕中。不幸的是，什么都没有出现。。。

<?
// A callback function to add a custom field to our taxonomy  
function my_custom_fields() {  
?>
<tr class="form-field">  
    <td>  
        hello 
    </td>  
</tr>  
<?
}  

// Add the fields to the taxonomy, using our callback function  
add_action( \'tha-seminar-category_edit_form_fields\', \'my_custom_fields\', 10, 2 );  
?>

register_taxonomy(\'tha-seminar-category\', \'tha_seminars\',
array("hierarchical" => true,
"label" => "Tha Seminar Categories",
\'update_count_callback\' => \'_update_post_term_count\',
\'query_var\' => true,
\'public\' => true,
\'show_ui\' => true,
\'show_admin_column\' => true,
\'show_tagcloud\' => true,
\'_builtin\' => false,
\'show_in_nav_menus\' => true,
\'show_in_rest\' => true,
\'show_in_quick_edit\' => true,
\'capabilities\' => array(
    \'manage_terms\' => \'edit_tha_seminars\',
    \'edit_terms\' => \'edit_tha_seminars\',
    \'delete_terms\' => \'edit_tha_seminars\',
    \'assign_terms\' => \'edit_tha_seminars\'
    )
)
);

谢谢你的帮助！