wordpress教程：如何在后台直接显示文章/页面/分类/标签和用户等ID号

wordpress建站中如何在后台直接显示文章、页面、分类、标签和用户等ID号？下面web建站小编给大家简单介绍一下具体代码！

打开当前主题 functions.php 文件，新增以下代码：

function ssid_column($cols) {
  $cols['ssid'] = 'ID';
  return $cols;
}

function ssid_value($column_name, $id) {
  if ($column_name == 'ssid')
  echo $id;
}
function ssid_return_value($value, $column_name, $id) {
  if ($column_name == 'ssid')
  $value = $id;
  return $value;
}

function ssid_css() {
?>
<style type="text/css">
  #ssid { width: 50px; } /* Simply Show IDs */
</style>
<?php
}

function ssid_add() {
  add_action('admin_head', 'ssid_css');
  add_filter('manage_posts_columns', 'ssid_column');
  add_action('manage_posts_custom_column', 'ssid_value', 10, 2);
  add_filter('manage_pages_columns', 'ssid_column');
  add_action('manage_pages_custom_column', 'ssid_value', 10, 2);
  add_filter('manage_media_columns', 'ssid_column');
  add_action('manage_media_custom_column', 'ssid_value', 10, 2);
  add_filter('manage_link-manager_columns', 'ssid_column');
  add_action('manage_link_custom_column', 'ssid_value', 10, 2);
  add_action('manage_edit-link-categories_columns', 'ssid_column');
  add_filter('manage_link_categories_custom_column', 'ssid_return_value', 10, 3);
  foreach ( get_taxonomies() as $taxonomy ) {
  add_action("manage_edit-${taxonomy}_columns", 'ssid_column');
  add_filter("manage_${taxonomy}_custom_column", 'ssid_return_value', 10, 3);
  }
  add_action('manage_users_columns', 'ssid_column');
  add_filter('manage_users_custom_column', 'ssid_return_value', 10, 3);
  add_action('manage_edit-comments_columns', 'ssid_column');
  add_action('manage_comments_custom_column', 'ssid_value', 10, 2);
}
add_action('admin_init', 'ssid_add');