您可以从下面的代码中获取参考。它将提供一个选项来更新注释的用户id(https://prnt.sc/s57q4f). 在活动主题的函数中粘贴下面的代码。php文件。我已经测试过了，它对我有效。如果对你有用，请告诉我。

# comment user id update metabox
function action_add_meta_boxes_comment( $comment ) {
    ?>
    <div id="commnet-user-id" class="stuffbox">
        <div class="inside">
        <h2 class="edit-comment-userid"><?php _e( \'Commment User ID\' ); ?></h2>
        <fieldset>
        <legend class="screen-reader-text"><?php _e( \'Comment User ID\' ); ?></legend>
        <table class="form-table editcomment" role="presentation">
        <tbody>
        <tr>
            <td class="first"><label for="name"><?php _e( \'User ID\' ); ?></label></td>
            <td><input type="text" name="newcomment_userid" size="30" value="<?php echo esc_attr( $comment->user_id ); ?>" id="user_id" /></td>
        </tr>

        </tbody>
        </table>
        </fieldset>
        </div>
        </div>
    <?php
};          
// add the action 
add_action( \'add_meta_boxes_comment\', \'action_add_meta_boxes_comment\', 10, 1 ); 

add_filter( \'comment_edit_redirect\',  \'save_edit_comment_data\', 10, 2 );
function save_edit_comment_data( $location, $comment_id )
{
    $_POST[\'user_id\'] = (int) $_POST[\'newcomment_userid\'];
    wp_update_comment( $_POST );
    return $location;
}

作为替代选项，您可以使用wp_update_comment_data 在数据库默认更新之前的筛选器。

专业人士

无需执行任何保存机制，数据准备的重点是在保存之前完全控制所有数据add_meta_boxes 而@Chetan Vaghela正在使用add\\u meta\\u box\\u comment。它们在编辑表单注释中的调用位置。php是并排的，所以结果应该是相同的。您还可以通过使用@Chetan Vaghela元框和注释数据过滤器来组合这两种方法wp_update_comment_data 进一步简化解决方案

如果使用add_meta_box function, 只能使用位置normal. 它将不会在其他位置渲染。

add_action( \'add_meta_boxes\', \'ws364679_register_meta_boxes\', 10, 2 );
add_filter( \'wp_update_comment_data\', \'ws364679_save_comment\' );
function ws364679_register_meta_boxes( $post_type, $comment )
{
    // this example use an add_meta_box + a metabox callback or just use your own html here and use the $comment variable as reference
    add_meta_box(\'user_id_box\', \'User ID:\', \'ws364679_metabox_callback\', \'comment\', \'normal\', \'default\', $comment );
}

function ws364679_metabox_callback( $comment )
    {
// if using id ane name \'user_id\' rather than comment_user_id, you don\'t need even need to use \'wp_update_comment_data\' filter because by default \'user_id\' will be prepared as the variable for putting into database. You may optionally use the filter for final checking.
    ?>
        <div class="custom-meta-box-container">
            <div class="form-row">
                <input type="text" id="comment_user_id" name="comment_user_id" value="<?php echo $comment->user_id; ?>"/>

            </div>
        </div>
    <?php
    }

function ws364679_save_comment( $data ) {
    // because user id is prepared somewhere before it is saved, so it is suitable to add any changes to `wp_update_comment_data` filter
    // in this filter $_REQUEST has been processed and prepared in $data

    // because username and email could be manually updated in the ui, you may add an automatic logic here to match your new user id by fetching it from data base

    // if the input box id and name is \'user_id\', no need to do this manipulation
    $data[\'user_id\'] = $data[\'comment_user_id\'];

    // any checking if you need before return

    return $data;
}