WordPress后台分类显示ID

functions.php里面

// 添加一个新的列 ID
function ssid_column($cols) {
    $cols[\'ssid\'] = \'ID\';
    return $cols;
}

// 显示 ID
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;
}

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

// 通过动作/过滤器输出各种表格和CSS
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\');