我正在为活动制作一个元框。每个活动都有自己的页面，其中包含一个用于排队的元框、背景图像、门票页面URL和一些文本。

为了创建队列，我想使用WP Tuts+“可重用自定义元框教程”中的可重复字段：http://wp.tutsplus.com/tutorials/reusable-custom-meta-boxes-part-1-intro-and-basic-fields/.

但是，我不知道如何在可重复字段中添加多个字段。这就是想法：

[可重复]
-文本字段：艺术家姓名
-文本字段：艺术家网站
-复选框：头条新闻（是或否）
[/repeatable]

这是教程中的代码：

function meta_box_callback($fields, $page) {
    global $post;
    echo \'<input type="hidden" name="\'.$page.\'_meta_box_nonce" value="\'.wp_create_nonce(basename(__FILE__)).\'" />\';

    // Begin the field table and loop
    echo \'<table class="form-table cpt">\';
    foreach ($fields as $field) {
        // get value of this field if it exists for this post
        if ($field[\'label\'])    $label      = $field[\'label\'];
        if ($field[\'desc\'])     $desc       = \'<span class="description">\'.$field[\'desc\'].\'</span>\';
        if ($field[\'id\'])       $id         = $field[\'id\'];
        if ($field[\'type\'])     $type       = $field[\'type\'];
        if ($field[\'value\'])    $value      = $field[\'value\'];
        if ($field[\'options\'])  $options    = $field[\'options\'];

        $meta   = get_post_meta($post->ID, $id, true);
        // begin a table row with
        echo \'<tr>
                <th class="cpt_title"><label for="\'.$id.\'">\'.$label.\'</label></th>
                <td class="cpt_content">\';
                switch($field[\'type\']) {
                    case \'repeatable\':
                        echo \'<a class="repeatable-add button" href="#">+</a>
                                <ul id="\'.$field[\'id\'].\'-repeatable" class="custom_repeatable">\';
                        $i = 0;
                        if ($meta) {
                            foreach($meta as $row) {
                                echo \'<li><span class="sort hndle">|||</span>
                                            <input type="text" name="\'.$field[\'id\'].\'[\'.$i.\']" id="\'.$field[\'id\'].\'" value="\'.$row.\'" size="30" />
                                            <a class="repeatable-remove button" href="#">-</a></li>\';
                                $i++;
                            }
                        } else {
                            echo \'<li><span class="sort hndle">|||</span>
                                        <input type="text" name="\'.$field[\'id\'].\'[\'.$i.\']" id="\'.$field[\'id\'].\'" value="" size="30" />
                                        <a class="repeatable-remove button" href="#">-</a></li>\';
                        }
                        echo \'</ul>
                            <span class="description">\'.$field[\'desc\'].\'</span>\';
                    break;
                } // switch
        echo \'</td></tr>\';
    } // foreach
    echo \'</table>\'; // table
}
function meta_box_save($post_id, $fields, $page) {

    // verify nonce
    if (!wp_verify_nonce($_POST[$page.\'_meta_box_nonce\'], basename(__FILE__))) 
        return $post_id;
    // check autosave
    if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE)
        return $post_id;
    // check permissions
    if ($page != $_POST[\'post_type\']) {
        if (!current_user_can(\'edit_page\', $post_id))
            return $post_id;
        } elseif (!current_user_can(\'edit_post\', $post_id)) {
            return $post_id;
    }

    // loop through fields and save the data
    foreach ($fields as $field) {
        if($field[\'type\'] == \'tax_select\') {
            // save taxonomies
            $term = $_POST[$field[\'id\']];
            wp_set_object_terms( $post_id, $term, $field[\'id\'] );
        }
        else {
            // save the rest
            $old = get_post_meta($post_id, $field[\'id\'], true);
            $new = $_POST[$field[\'id\']];
            if ($new && $new != $old) {
                update_post_meta($post_id, $field[\'id\'], $new);
            } elseif (\'\' == $new && $old) {
                delete_post_meta($post_id, $field[\'id\'], $old);
            }
        }
    } // foreach
}