我正在嘗試為管理員添加自定義 css，如下所示    add_action('admin_head', 'hey_custom_admin_css');    function hey_custom_admin_css() {            global $current_user;            $user_id = get_current_user_id();            if(is_admin() && $user_id != '1'){                echo "<style>#wpwrap{background-color:red;}</style>";                }    }并且工作完美，但我想將其用作用戶名，而不是用戶 ID有可能有嗎？如果是的話請(qǐng)給我建議謝謝編輯后的代碼1st...CSS 工作但適用于所有用戶。包括代碼中列出的內(nèi)容。<?php /**  * Plugin Name: My Plugin  * Plugin URI: https://google.com  * Description: Me  * Version: 1.0  * Author: Plugin  * Author URI: https://google.com  */   add_action('admin_head', 'hey_custom_admin_css');function hey_custom_admin_css() {global $current_user;  wp_get_current_user(); $username = $current_user->user_login; if(is_admin() && ($username != 'xyz' || $username != 'abc')){   echo "     <style>         #wpwrap{background-color:red;}     </style>";  } }第二...給出錯(cuò)誤<?php /**  * Plugin Name: My Plugin  * Plugin URI: https://google.com  * Description: Me  * Version: 1.0  * Author: Plugin  * Author URI: https://google.com  */   global $current_user;  wp_get_current_user();  //Error on this line$username = $current_user->user_login; if(is_admin() && ($username != 'xyz' || $username != 'abc')){   echo "     <style>         #wpwrap{background-color:red;}     </style>";  }給定第二個(gè)錯(cuò)誤致命錯(cuò)誤：未捕獲錯(cuò)誤：調(diào)用 /home/dh_w4i633/site.com/wp-content/plugins/me/me.php:13 中未定義的函數(shù) wp_get_current_user() 堆棧跟蹤：#0 /home/dh_w4i633/site.com/ wp-settings.php(371): include_once() #1 /home/dh_w4i633/site.com/wp-config.php(106): require_once('/home/dh_w4i633...') #2 /home/dh_w4i633 /site.com/wp-load.php(37): require_once('/home/dh_w4i633...') #3 /home/dh_w4i633/site.com/wp-admin/admin.php(34): require_once( '/home/dh_w4i633...') #4 /home/dh_w4i633/site.com/wp-admin/plugins.php(10): require_once('/home/dh_w4i633...') #5 {main} 拋出在 /home/dh_w4i633/site.com/wp-content/plugins/me/me.php 第 13 行