我最近才开始工作。您应该搜索并替换metaname 使用您的元框名称。

保持格式的关键是使用wpautop(); 保存数据时。

add_action( \'add_meta_boxes\', \'add_metaname_box\');

add_action( \'save_post\', \'metaname_save\');

function add_metaname_box() {
    add_meta_box(
        \'metaname_id\',
        __( \'metaname text\', \'metaname_textdomain\'),
        \'metaname_custom_box\',
        \'page\'
    );
}

function metaname_custom_box() {
    global $post;
    wp_nonce_field( plugin_basename( __FILE__ ), \'metaname_noncename\' );
    $data = get_post_meta($post->ID, \'metaname_custom_box\', true);
    echo <<<EOT
    <script type="text/javascript">
jQuery(document).ready(function() {
    jQuery("#metaname_custom_box").addClass("mceEditor");
    if ( typeof( tinyMCE ) == "object" &&
         typeof( tinyMCE.execCommand ) == "function" ) {
        tinyMCE.execCommand("mceAddControl", false, "metaname_custom_box");
    }
});
</script>
    <textarea id="metaname_custom_box" name="metaname_custom_box">$data</textarea>
EOT;
}

function metaname_save($post_id) {
    global $post;

    // Verify
     if ( !wp_verify_nonce( $_POST[\'metaname_noncename\'], plugin_basename(__FILE__) )) {
         return $post_id;
     }
     if ( \'page\' == $_POST[\'post_type\'] ) {
         if ( !current_user_can( \'edit_page\', $post_id ))
             return $post_id;
     } else {
         if ( !current_user_can( \'edit_post\', $post_id ))
             return $post_id;
     }

     $key = \'metaname_custom_box\';
    $data = wpautop($_POST[$key]);

     // New, Update, and Delete
     if(get_post_meta($post_id, $key) == "") 
         add_post_meta($post_id, $key, $data, true);
     elseif($data != get_post_meta($post_id, $key, true))
         update_post_meta($post_id, $key, $data); 
     elseif($data == "")
         delete_post_meta($post_id, $key, get_post_meta($post_id, $key, true));        
}