//WordPress用户自动登录
if (!is_user_logged_in()) {
  $creds = array();
  $creds['user_login'] = 'demo'; //用户名是demo，自行修改
  $creds['user_password'] = 'password'; //密码是password
  $creds['remember'] = true;
  $user = wp_signon( $creds, false );
  if ( is_wp_error($user) )
    echo $user->get_error_message();
}

//WordPress用户自动登录
if (!is_user_logged_in()) {
  $user_login = 'demo'; // 用户名是demo，自行修改
 
  // 获取用户id
  $user = get_userdatabylogin($user_login);
  $user_id = $user->ID;
 
  // 登录
  wp_set_current_user($user_id, $user_login);
  wp_set_auth_cookie($user_id);
  do_action('wp_login', $user_login);
}