自用WordPress代码片段分享

WordPress使用久了，给主题添加的功能较多，年纪大了，怕忘记，就记下来，方便自己寻找，本次代码均添加在主题文件的functions.php中。

1、移除站点健康仪表盘小工具，代码来自WordPress大学

/**
 * 移除 工具-站点健康 菜单
 */
function wpkj_remove_site_health_menu(){
    remove_submenu_page( 'tools.php','site-health.php' ); 
}
add_action( 'admin_menu', 'wpkj_remove_site_health_menu' );

2、更新文章的自动更新时间为当前时间

//时间
function update_post_publish_date_on_update( $post_id, $post, $update ) {
    global $wpdb;

    // 跳过：自动保存、修订、未发布、非文章
    if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;
    if ( wp_is_post_revision( $post_id ) ) return;
    if ( $post->post_type !== 'post' ) return;
    if ( ! $update ) return;

    // 检查是否已执行过（避免重复）
    if ( get_post_meta( $post_id, '_custom_updated_date_once', true ) ) {
        return;
    }

    // 获取当前时间（本地时间）
    $current_time     = current_time( 'mysql' );
    $current_time_gmt = get_gmt_from_date( $current_time );

    // 使用直接 SQL 更新 post_date，避免触发额外钩子
    $wpdb->update(
        $wpdb->posts,
        array(
            'post_date'     => $current_time,
            'post_date_gmt' => $current_time_gmt
        ),
        array( 'ID' => $post_id )
    );

    // 设置标记，避免重复更新
    update_post_meta( $post_id, '_custom_updated_date_once', 1 );

    // 可选：删除标记（只在这次保存中有效）
    add_action( 'shutdown', function() use ( $post_id ) {
        delete_post_meta( $post_id, '_custom_updated_date_once' );
    } );
}
add_action( 'save_post', 'update_post_publish_date_on_update', 10, 3 );

3、给网站添加CDN，代码来自zhang.ge

// **
//  * 原文地址：https://zhang.ge/4905.html
// **
function QiNiuCDN(){
     function Rewrite_URI($html){
         /* 前面自己的域名域名,后面是需要加速的静态文件类型，使用分隔符 | 隔开即可 */
         $pattern ='/https:\/\/(www\.|)5v13\.com\/wp-([^"\']*?)\.(jpg|webp|js|gif|png|jpeg)/i';
         /* CDN 地址,请自行替换成腾讯、阿里等cdn地址 */
         $replacement = 'https://cdn.5v13.com/wp-$2.$3';
 	$html = preg_replace($pattern, $replacement,$html);
 	return $html;
 	}
     if(!is_admin()){
         ob_start("Rewrite_URI");
     }
 }
 add_action('init', 'QiNiuCDN');

4、给经典编辑器添加首行缩进，同时需要添加js，js路径我这里为主题目录下的/js/indent-first-line.js，可以根据自己的实际情况修改

// 添加自定义按钮到经典编辑器
function add_indent_first_line_button($buttons) {
    array_push($buttons, 'indent_first_line');
    return $buttons;
}
add_filter('mce_buttons', 'add_indent_first_line_button');

// 注册并添加自定义 TinyMCE 插件
function register_indent_first_line_plugin($plugin_array) {
    $plugin_array['indent_first_line'] = get_template_directory_uri() . '/js/indent-first-line.js';
    return $plugin_array;
}
add_filter('mce_external_plugins', 'register_indent_first_line_plugin');

js代码如下，请自行创建

(function() {
    tinymce.PluginManager.add('indent_first_line', function(editor) {
        editor.addButton('indent_first_line', {
            text: '首行缩进',
            icon: false,
            onclick: function() {
                var selectedNode = editor.selection.getNode();
                editor.dom.setStyle(selectedNode, 'text-indent', '2em');
            }
        });
    });
})();

5.统计网站所有的草稿并列出，搭配https://seo.juziseo.com/tools/kai/

// 添加后台菜单项：草稿编辑链接
add_action('admin_menu', function () {
    add_menu_page(
        '草稿链接',
        '草稿链接',
        'edit_posts',
        'theme-draft-links',
        'theme_draft_links_page_callback',
        'dashicons-media-code',
        25
    );
});

// 页面输出函数（含复制按钮）
function theme_draft_links_page_callback() {
    if (!current_user_can('edit_posts')) {
        wp_die(__('你无权限查看此页面。'));
    }

    echo '<div class="wrap">';
    echo '<h1>草稿编辑链接</h1>';

    // 使用 transient 缓存草稿链接
    $cache_key = 'cached_draft_edit_links';
    $cached_links = get_transient($cache_key);

    if ($cached_links === false) {
        $query = new WP_Query(array(
            'post_status'    => 'draft',
            'post_type'      => 'post',
            'posts_per_page' => -1,
            'fields'         => 'ids',
            'no_found_rows'  => true,
            'cache_results'  => true,
        ));

        if (!empty($query->posts)) {
            $links = array_map(function ($post_id) {
                return esc_url(get_edit_post_link($post_id));
            }, $query->posts);

            $cached_links = implode("\n", $links);
        } else {
            $cached_links = '';
        }

        set_transient($cache_key, $cached_links, 60);
    }

    if (empty($cached_links)) {
        echo '<p>暂无草稿文章。</p>';
    } else {
        echo '<p>以下是草稿文章的编辑链接：</p>';

        // 复制按钮
        echo '<button id="copyLinksBtn" class="button button-primary" style="margin-bottom:10px;">复制全部</button>';
        echo '<span id="copyStatus" style="margin-left:10px;"></span>';

        // 链接显示区域
        echo '<pre id="linksOutput" style="background:#f5f5f5; padding:15px; border-radius:6px; overflow:auto; font-size:13px;"><code>';
        echo esc_html($cached_links);
        echo '</code></pre>';

        // JS 脚本：复制逻辑
        echo <<<HTML
<script>
document.getElementById('copyLinksBtn').addEventListener('click', function() {
    const content = document.getElementById('linksOutput').innerText;
    navigator.clipboard.writeText(content).then(function() {
        document.getElementById('copyStatus').innerText = "已复制！";
        setTimeout(() => document.getElementById('copyStatus').innerText = "", 2000);
    }, function() {
        document.getElementById('copyStatus').innerText = "复制失败！";
    });
});
</script>
HTML;
    }

    echo '</div>';
}

6.在WordPress文章后台添加一个复制按钮，快速复制一篇并添加为草稿

// 复制文章
function zm_clone_post_as_draft() {
	global $wpdb;
	if (! ( isset( $_GET['post']) || isset( $_POST['post'])  || ( isset($_REQUEST['action']) && 'zm_clone_post_as_draft' == $_REQUEST['action'] ) ) ) {
		wp_die('No post to clone has been supplied!');
	}
 
	//  Nonce 验证
	if ( !isset( $_GET['clone_nonce'] ) || !wp_verify_nonce( $_GET['clone_nonce'], basename( __FILE__ ) ) )
	return;
 
	// 获取原文章ID
	$post_id = (isset($_GET['post']) ? absint( $_GET['post'] ) : absint( $_POST['post'] ) );
 
	// 所有文章数据
	$post = get_post( $post_id );
 
	// 如果不希望当前用户作为新文章作者，将下两行替换为$new_post_author = $post->post_author;
	$current_user = wp_get_current_user();
	$new_post_author = $current_user->ID;
 
	// 如果发布数据存在，则创建发布克隆
	if (isset( $post ) && $post != null) {
 
	// 创建新文章数组
		$args = array(
			'comment_status' => $post->comment_status,
			'ping_status'    => $post->ping_status,
			'post_author'    => $new_post_author,
			'post_content'   => $post->post_content,
			'post_excerpt'   => $post->post_excerpt,
			'post_name'      => $post->post_name,
			'post_parent'    => $post->post_parent,
			'post_password'  => $post->post_password,
			'post_status'    => 'draft',
			'post_title'     => $post->post_title,
			'post_type'      => $post->post_type,
			'to_ping'        => $post->to_ping,
			'menu_order'     => $post->menu_order
		);
 
		// 通过wp_insert_post() 函数添加文章
		$new_post_id = wp_insert_post( $args );
 
		// 将新的文章设置为草稿
		$taxonomies = get_object_taxonomies($post->post_type); // 返回文章类型的分类数组，例如：array("category", "post_tag");
		foreach ($taxonomies as $taxonomy) {
			$post_terms = wp_get_object_terms($post_id, $taxonomy, array('fields' => 'slugs'));
			wp_set_object_terms($new_post_id, $post_terms, $taxonomy, false);
		}
 
		// 查询复制所有文章信息 post meta
		$post_meta_infos = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->postmeta WHERE post_id=$post_id");
		if (count($post_meta_infos)!=0) {
			$sql_query = "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) ";
			foreach ($post_meta_infos as $meta_info) {
				$meta_key = $meta_info->meta_key;
				if( $meta_key == '_wp_old_slug' ) continue;
				$meta_value = addslashes($meta_info->meta_value);
				$sql_query_sel[]= "SELECT $new_post_id, '$meta_key', '$meta_value'";
			}
			$sql_query.= implode(" UNION ALL ", $sql_query_sel);
			$wpdb->query($sql_query);
		}
		wp_redirect( admin_url( 'edit.php?post_type='.$post->post_type ) );
		exit;
	} else {
		wp_die('Post creation failed, could not find original post: ' . $post_id);
	}
}
add_action( 'admin_action_zm_clone_post_as_draft', 'zm_clone_post_as_draft' );
 
 
// 复制文章并添加到列表
function zm_clone_post_link( $actions, $post ) {
	if (current_user_can('edit_posts')) {
		$actions['clone'] = '<a href="' . wp_nonce_url('admin.php?action=zm_clone_post_as_draft&post=' . $post->ID, basename(__FILE__), 'clone_nonce' ) . '" title="Clone this '.$post->post_type.'" rel="permalink">复制</a>';
	}
	return $actions;
}
 
add_filter( 'post_row_actions', 'zm_clone_post_link', 10, 2 );
add_filter('page_row_actions', 'zm_clone_post_link', 10, 2);