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<?php
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/**
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* 维护模式功能
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*
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* 提供网站维护模式的开启/关闭及自定义设置
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*/
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// 防止直接访问
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if (!defined('ABSPATH')) {
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exit;
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}
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/**
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* 注册维护模式设置菜单
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*/
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function nenghui_maintenance_menu() {
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add_options_page(
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'维护模式设置', // 页面标题
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'维护模式', // 菜单标题
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'manage_options', // 权限要求
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'nenghui-maintenance', // 菜单slug
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'nenghui_maintenance_page_html' // 回调函数
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);
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}
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add_action('admin_menu', 'nenghui_maintenance_menu');
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/**
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* 注册设置项
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*/
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function nenghui_register_maintenance_settings() {
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register_setting('nenghui_maintenance_options', 'nenghui_maintenance_mode_enabled');
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register_setting('nenghui_maintenance_options', 'nenghui_maintenance_mode_title');
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register_setting('nenghui_maintenance_options', 'nenghui_maintenance_mode_content');
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}
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add_action('admin_init', 'nenghui_register_maintenance_settings');
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/**
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* 设置页面 HTML
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*/
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function nenghui_maintenance_page_html() {
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if (!current_user_can('manage_options')) {
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return;
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}
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?>
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<div class="wrap">
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<h1><?php echo esc_html(get_admin_page_title()); ?></h1>
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<form action="options.php" method="post">
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<?php
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settings_fields('nenghui_maintenance_options');
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do_settings_sections('nenghui_maintenance_options');
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$enabled = get_option('nenghui_maintenance_mode_enabled');
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$title = get_option('nenghui_maintenance_mode_title', '网站维护中');
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$content = get_option('nenghui_maintenance_mode_content', '我们正在对网站进行升级维护，请稍后再访问。');
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?>
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<table class="form-table">
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<tr valign="top">
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<th scope="row">启用维护模式</th>
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<td>
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<label>
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<input type="checkbox" name="nenghui_maintenance_mode_enabled" value="1" <?php checked(1, $enabled, true); ?> />
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开启维护模式
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</label>
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<p class="description">开启后，只有管理员可以访问前台，普通访客将看到维护页面。</p>
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</td>
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</tr>
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<tr valign="top">
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<th scope="row">维护标题</th>
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<td>
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<input type="text" name="nenghui_maintenance_mode_title" value="<?php echo esc_attr($title); ?>" class="regular-text" />
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</td>
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</tr>
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<tr valign="top">
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<th scope="row">维护内容</th>
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<td>
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<?php
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wp_editor($content, 'nenghui_maintenance_mode_content', array(
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'textarea_name' => 'nenghui_maintenance_mode_content',
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'media_buttons' => false,
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'textarea_rows' => 10,
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'teeny' => true
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));
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?>
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</td>
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</tr>
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</table>
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<?php submit_button(); ?>
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</form>
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</div>
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<?php
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}
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/**
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* 执行维护模式拦截
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*/
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function nenghui_maintenance_mode_handler() {
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// 如果维护模式未开启，直接返回
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if (!get_option('nenghui_maintenance_mode_enabled')) {
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return;
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}
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// 如果是管理员或已登录用户，允许访问
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// 这里使用 edit_themes 权限作为判断标准，通常管理员和编辑都有此权限
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// 或者简单地使用 is_user_logged_in() 允许所有登录用户
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if (current_user_can('edit_themes') || is_user_logged_in()) {
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return;
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}
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// 排除登录页面和后台
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if (in_array($GLOBALS['pagenow'], array('wp-login.php', 'wp-register.php'))) {
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return;
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}
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if (is_admin()) {
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return;
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}
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// 获取设置的标题和内容
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$title = get_option('nenghui_maintenance_mode_title', '网站维护中');
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$content = get_option('nenghui_maintenance_mode_content', '我们正在对网站进行升级维护，请稍后再访问。');
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// 处理内容中的换行（如果是纯文本框输入的话，但这里用了wp_editor，通常不需要nl2br，不过为了保险可以加上wpautop）
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$content_html = wpautop($content);
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// 获取站点 Logo
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$logo_url = get_theme_mod('site_logo');
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if (!$logo_url) {
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$logo_url = 'https://nenghui.com/wp-content/uploads/2025/11/logo-2.png';
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}
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// 发送 503 状态码
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header('HTTP/1.1 503 Service Unavailable');
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header('Retry-After: 3600');
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// 输出维护页面
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?>
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<!DOCTYPE html>
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<html lang="<?php echo get_bloginfo('language'); ?>">
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<head>
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<meta charset="<?php echo get_bloginfo('charset'); ?>">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title><?php echo esc_html($title); ?> - <?php echo get_bloginfo('name'); ?></title>
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<style>
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:root {
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--primary-color: #007cba;
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--text-color: #333;
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--bg-color: #f7f9fc;
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}
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body {
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font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
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background: var(--bg-color);
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color: var(--text-color);
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height: 100vh;
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margin: 0;
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display: flex;
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align-items: center;
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justify-content: center;
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text-align: center;
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}
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.maintenance-container {
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background: #fff;
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padding: 60px 40px;
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border-radius: 12px;
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box-shadow: 0 10px 30px rgba(0,0,0,0.08);
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max-width: 500px;
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width: 90%;
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margin: 20px;
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position: relative;
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overflow: hidden;
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}
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.maintenance-container::before {
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content: '';
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position: absolute;
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top: 0;
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left: 0;
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width: 100%;
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height: 6px;
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background: linear-gradient(90deg, #007cba, #00a0d2);
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}
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.logo {
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margin-bottom: 30px;
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}
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.logo img {
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max-height: 60px;
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width: auto;
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}
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h1 {
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color: #222;
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margin: 0 0 20px;
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font-size: 24px;
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font-weight: 600;
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}
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.content {
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font-size: 16px;
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line-height: 1.6;
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color: #666;
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margin-bottom: 30px;
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}
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.footer {
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margin-top: 30px;
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font-size: 13px;
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color: #999;
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border-top: 1px solid #f0f0f0;
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padding-top: 20px;
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}
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.maintenance-icon {
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font-size: 48px;
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margin-bottom: 20px;
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color: var(--primary-color);
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}
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</style>
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</head>
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<body>
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<div class="maintenance-container">
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<?php if ($logo_url): ?>
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<div class="logo">
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<img src="<?php echo esc_url($logo_url); ?>" alt="<?php echo esc_attr(get_bloginfo('name')); ?>">
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</div>
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<?php else: ?>
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<div class="maintenance-icon">⚙️</div>
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<?php endif; ?>
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<h1><?php echo esc_html($title); ?></h1>
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<div class="content">
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<?php echo $content_html; // 允许HTML内容 ?>
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</div>
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<div class="footer">
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© <?php echo date('Y'); ?> Nenghui Energy Technology Co.,Ltd. All rights reserved.
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</div>
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</div>
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</body>
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</html>
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<?php
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exit();
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}
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// 挂载到 template_redirect 或 get_header
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add_action('template_redirect', 'nenghui_maintenance_mode_handler');
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