有的时候我们需要直观的知道文章或者页面的id是多少，也就是在文章和页面列表添加文章id的自定义列，下面的代码就很有用了：
/**********文章***********/
add_filter('manage_posts_columns', 'add_new_posts_columns');
function add_new_posts_columns($book_columns) {
$new_columns['cb'] = '<input type="checkbox" />';
$new_columns['id'] = __('ID');
$new_columns['title'] = _x( 'Title', 'column name' );
$new_columns['author'] = __('Author');
$new_columns['categories'] = __('Categories');
$new_columns['tags'] = __('Tags');
$new_columns['date'] = _x('Date', 'column name');
return $new_columns;
}
add_action('manage_posts_custom_column', 'manage_posts_columns', 10, 2);
function manage_posts_columns($column_name, $id) {
global $wpdb;
switch ($column_name) {
case 'id':
echo $id;
break;
default:
break;
}
}
/**************页面************/
add_filter('manage_pages_columns', 'add_new_pages_columns');
function add_new_pages_columns($book_columns) {
$new_columns['cb'] = '<input type="checkbox" />';
$new_columns['id'] = __('ID');
$new_columns['title'] = _x( 'Title', 'column name' );
$new_columns['author'] = __('Author');
$new_columns['date'] = _x('Date', 'column name');
return $new_columns;
}
add_action('manage_pages_custom_column', 'manage_pages_columns', 10, 2);
function manage_pages_columns($column_name, $id) {
global $wpdb;
switch ($column_name) {
case 'id':
echo $id;
break;
default:
break;
}
}效果如下：
WordPress后台页面列表：
WordPress后台文章列表：
当然了，如果只是分享这个，就不是我陌小雨的风格了，陌小雨想带给大家的是一种思路：比如下面这些
到这里，我知道你想说什么了，什么也不说了，上图吧，^_^
2016-7-8日更新：
用陌小雨上面分享的代码，id是显示在最左侧的，宽度也没法自定义，好处是你可以增加自定义字段的列，可操作性强。如果你觉得难看的话，可以使用下面的代码，可以让WordPress后台显示文章id、分类目录id、链接分类ID等。
//代码来源于: Show IDs by 99 Robots插件
// Hooks + Filters
add_action( 'admin_head', array('WPSiteShowIDs', 'add_css'));
// For Post Management
add_filter( 'manage_posts_columns', array('WPSiteShowIDs', 'add_column') );
add_action( 'manage_posts_custom_column', array('WPSiteShowIDs', 'add_value'), 10, 2 );
// For Page Management
add_filter( 'manage_pages_columns', array('WPSiteShowIDs', 'add_column') );
add_action( 'manage_pages_custom_column', array('WPSiteShowIDs', 'add_value'), 10, 2 );
// For Media Management
add_filter( 'manage_media_columns', array('WPSiteShowIDs', 'add_column') );
add_action( 'manage_media_custom_column', array('WPSiteShowIDs', 'add_value'), 10, 2 );
// For Link Management
add_filter( 'manage_link-manager_columns', array('WPSiteShowIDs', 'add_column') );
add_action( 'manage_link_custom_column', array('WPSiteShowIDs', 'add_value'), 10, 2 );
// For Link_Category Management
add_action( 'manage_edit-link_category_columns', array('WPSiteShowIDs', 'add_column') );
add_filter( 'manage_link_category_custom_column', array('WPSiteShowIDs', 'add_return_value'), 10, 3 );
// For Category Management
add_action( 'manage_edit-link-categories_columns', array('WPSiteShowIDs', 'add_column') );
add_filter( 'manage_link_categories_custom_column', array('WPSiteShowIDs', 'add_return_value'), 10, 3 );
// For User Management
add_action( 'manage_users_columns', array('WPSiteShowIDs', 'add_column') );
add_filter( 'manage_users_custom_column', array('WPSiteShowIDs', 'add_return_value'), 10, 3 );
// For Comment Management
add_action( 'manage_edit-comments_columns', array('WPSiteShowIDs', 'add_column') );
add_action( 'manage_comments_custom_column', array('WPSiteShowIDs', 'add_value'), 10, 2 );
add_action('admin_init', array('WPSiteShowIDs', 'custom_objects'));
class WPSiteShowIDs {
static function custom_objects() {
// For Custom Taxonomies
foreach ( get_taxonomies(array('public' => true), 'names') as $custom_taxonomy ) {
if (isset($custom_taxonomy)) {
add_action("manage_edit-" . $custom_taxonomy . "_columns", array('WPSiteShowIDs', 'add_column'));
add_filter("manage_" . $custom_taxonomy . "_custom_column", array('WPSiteShowIDs', 'add_return_value'), 10, 3);
}
}
// For Custom Post Types
foreach (get_post_types(array('public' => true ), 'names') as $post_type) {
if (isset($post_type)) {
add_action("manage_edit-". $post_type . "_columns", array('WPSiteShowIDs', 'add_column'));
add_filter("manage_". $post_type . "_custom_column", array('WPSiteShowIDs', 'add_return_value'), 10, 3);
}
}
}
static function add_css() {
?>
<style type="text/css">
#wpsite-show-ids {
width: 50px;
}
</style>
<?php
}
static function add_column($cols) {
$cols['wpsite-show-ids'] = 'ID';
return $cols;
}
static function add_value($column_name, $id) {
if ( $column_name == 'wpsite-show-ids' ) {
echo $id;
}
}
static function add_return_value($value, $column_name, $id) {
if ( $column_name == 'wpsite-show-ids' ) {
$value = $id;
}
return $value;
}
}
