wordpress 后台用户表格页面显示自定义用户字段

        官网找的代码：

//Adds Custom Column To Users List Table
function custom_add_user_id_column($columns) {
    $columns['user_id'] = 'User ID';
    return $columns;
}
add_filter('manage_users_columns', 'custom_add_user_id_column');
//Adds Content To The Custom Added Column
function custom_show_user_id_column_content($value, $column_name, $user_id) {
    $user = get_userdata( $user_id );
    if ( 'user_id' == $column_name )
        return $user_id;
    return $value;
}
add_filter('manage_users_custom_column',  'custom_show_user_id_column_content', 10, 3);

        我自己修改的：

//Adds Custom Column To Users List Table
function custom_add_user_id_column($columns) {
    $columns['user_id'] = '到期时间';
    return $columns;
}
add_filter('manage_users_columns', 'custom_add_user_id_column');
//Adds Content To The Custom Added Column
function custom_show_user_id_column_content($value, $column_name, $user_id) {
    $enddate = get_user_meta( $user_id, 'User_Time_Balance',true);
    if ( 'user_id' == $column_name ){
        if($enddate){
            return $enddate;
        }else{
            return "未设置到期时间！";
        }
    }
}
add_filter('manage_users_custom_column',  'custom_show_user_id_column_content', 10, 3);

        效果：