在functions.php中添加如下代码

add_action('admin_menu', 'create_meta_box');   //在加载管理员界面界面的时候调用create_meta_box函数   add_action('save_post', 'save_postdata');   function create_meta_box(){    if(function_exists('add_meta_box')){           //add_meta_box函数在文章编辑页面内添加版块，具体用法放在文章最后           add_meta_box('new-meta-box','自定义模块','new_meta_box','post','normal','high');           //此函数调用new_meta_box函数       }}function new_meta_box(){    global $post;       $meta_box_value = get_post_meta($post->ID, 'answer', true);         echo '
答案
';       wp_editor(str_replace('\"','"',$meta_box_value), 'answer', $settings = array(quicktags=>1,                    tinymce=>1,                    media_buttons=>0,                    textarea_rows=>4,                       editor_class=>"textareastyle") ); }function save_postdata($post_id){    global $post;    $data = wpautop($_POST['answer']);    if(get_post_meta($post_id,'answer') == "")           add_post_meta($post_id,'answer', $data, true);       elseif($data != get_post_meta($post_id,'answer', true))           update_post_meta($post_id,'answer', $data);       elseif($data == "")           delete_post_meta($post_id,'answer', get_post_meta($post_id,'answer', true));   }

前台调用代码：

echo get_post_meta($post->ID, 'answer', true);

 

效果：