您不应该编辑核心文件，这会使升级非常困难。

使用add_meta_box() 函数并将其放入插件文件中。

请参见下面的示例，此插件将向wordpress安装中的所有页面添加一个元框。只需根据自己的方式进行编辑。。。

<?php 
/*
Plugin Name: META Data Plugin
Plugin URI: http://eddsmith.me
Description: Adds a META description box to all pages.
Version: 1.0
Author: Edd Smith
Author URI: http://eddsmith.me
*/
?>
<?php

add_action(\'admin_init\',\'metadescription_meta_box_init\');

function metadescription_meta_box_init() {

    // The Function that creates the meta box
    add_meta_box(\'metadescription-meta\',__(\'META description\',\'metadescription-plugin\'), \'metadescription_meta_box\', \'page\',\'advanced\',\'default\'); 

    // hook to save our meta box data when the page is saved
    add_action(\'save_post\',\'metadescription_save_meta_box\');  

}


function metadescription_meta_box($post,$box) {

    // retrieve our custom meta box values
    $metadescription = get_post_meta($post->ID,\'_metadescription\',true);

    // custom meta box form elements
    echo \'<p>\' .__(\'Enter META description below. Remember... <br/>#1 -Search engines truncate the description at 160 characters<br/>#2 - Leave blank and search engines will choose text for you<br/>#3 - Since 2009 META descriptions do not influence Googles ranking algorithms. \',\'metadescription-plugin\'). \': <input type="text" name="metadescription" value="\'.esc_attr($metadescription).\'" style="width:100%;"></p>\';    

}


function metadescription_save_meta_box($post_id,$post) {
    // if post is a revision skip saving our meta box data
    if($post->post_type == \'revision\') { return; }


    // process form data if $_POST is set
    if(isset($_POST[\'metadescription\'])) {

    // save the meta box data as post meta using the post ID as a unique prefix
    update_post_meta($post_id,\'_metadescription\', esc_attr($_POST[\'metadescription\']));
    }
}


?>

在这段代码中，我正在更改编辑的列。php页面，我基本上只保留了复选框、作者和日期，我正在将帖子中的acf字段添加到编辑中。php页面，但您可以在那里添加其他元。

/* -------------------------------------------------------------------------------
  Custom Columns
  ------------------------------------------------------------------------------- */

function my_posts_columns($columns) {
    $columns = array(
        \'cb\' => \'<input type="checkbox" />\',
        \'thumbnail\' => \'Снимка\',
        \'title\' => \'Заглавие на обявата\',
        \'category\' => \'Категория\',
        \'sub-cat\' => \'Под-категория\',
        \'author\' => \'Автор\',
        \'date\' => \'Дата\',
    );
    return $columns;
}

function my_custom_columns($column) {
    global $post;
    if ($column == \'thumbnail\') {
        if (get_field(\'photos\')) {
            $images = get_field(\'photos\');
            $image_1 = $images[0];
            echo \'<img src="\' . $image_1[\'url\'] . \'" style="max-width:150px;" alt="\' . $images[\'alt\'] . \'" />\';
        } else {
            echo \'Няма изображение..\';
        }
    }

    if ($column == \'category\') {
        if (get_field(\'select-category\')) {
            echo the_field(\'select-category\');
        } else {
            echo \'Unknown\';
        }
    }
    if ($column == \'sub-cat\') {
        if (get_field(\'sub-cat-auto\')) {
            echo the_field(\'sub-cat-auto\');
        }
    }
}

add_action("manage_posts_custom_column", "my_custom_columns");
add_filter("manage_posts_columns", "my_posts_columns");
/* -------------------------------------------------------------------------------
  Sortable Columns
  ------------------------------------------------------------------------------- */

function cat_column_register_sortable($columns) {
    $columns [\'category\'] = \'category\';
    return $columns;
}

add_filter("manage_edit-post_sortable_columns", "cat_column_register_sortable");

function subcat_column_register_sortable($columns) {
    $columns [\'sub-cat\'] = \'sub-cat\';
    return $columns;
}

add_filter("manage_edit-post_sortable_columns", "subcat_column_register_sortable");
/* -------------------------------------------------------------------------------
  Custom Columns END
  ------------------------------------------------------------------------------- */