问题在于ri_display_metaboxes() 更具体地说，这一行：

foreach ($meta_boxes as $meta_box) {

要克服它，您可以使用$callback_args 的参数add_meta_box 作用

所以试试这个：

function ri_add_custom_box() {
    global $prefix, $meta_box, $meta_boxes;


    $prefix = \'_ri_custom_meta_\'; // a custom prefix to help us avoid pulling data from the wrong meta box
    $meta_boxes = array();

    $meta_boxes[] = array(  
    \'id\' => \'ri_meta_box_panel1\', // the id of our meta box
    \'title\' => \'Test1\', // the title of the meta box
    \'page\' => \'ri_my_page\', // display this meta box on post editing screens
    \'context\' => \'side\',
    \'priority\' => \'high\', // keep it near the top
        \'fields\' => array( // all of the options inside of our meta box
            array(
                \'name\' => \'Test1:\',
                \'desc\' => \'Test1\',
                \'id\' => $prefix . \'Test1\',
                \'type\' => \'text\',
                \'std\' => \'\'
            ),
        )
    );

    $meta_boxes[] = array(  
    \'id\' => \'ri_meta_box_panel2\', // the id of our meta box
    \'title\' => \'Test2\', // the title of the meta box
    \'page\' => \'ri_my_page\', // display this meta box on post editing screens
    \'context\' => \'side\',
    \'priority\' => \'high\', // keep it near the top
        \'fields\' => array( // all of the options inside of our meta box
            array(
                \'name\' => \'Test2:\',
                \'desc\' => \'Test2\',
                \'id\' => $prefix . \'Test2\',
                \'type\' => \'text\',
                \'std\' => \'\'
            ),
        )
    );

    foreach ($meta_boxes as $meta_box) {
        new Ri($meta_box);
        add_meta_box($meta_box[\'id\'], $meta_box[\'title\'], array(&$this, \'ri_display_metaboxes\'), $meta_box[\'page\'], $meta_box[\'context\'], $meta_box[\'priority\'],array(\'fields\' => $meta_box[\'fields\']));
    }
}


function ri_display_metaboxes($post,$meta_b) {
    global $meta_boxes, $post;

    echo \'<input type="hidden" name="ri_meta_box_nonce" value="\', wp_create_nonce(basename(__FILE__)), \'" />\';
    echo \'<table class="form-table">\';

        foreach ((array)$meta_b[\'arg\'][\'fields\'] as $field) {
            $meta = get_post_meta($post->ID, $field[\'id\'], true);
            echo \'<tr>\', // create a table row for each option
                \'<th style="width:20%"><label for="\', $field[\'id\'], \'">\', $field[\'name\'], \'</label></th>\',
                \'<td>\';
            switch ($field[\'type\']) {
                case \'text\': // the HTML to display for type=text options
                    echo \'<input type="text" name="\', $field[\'id\'], \'" id="\', $field[\'id\'], \'" value="\', $meta ? $meta : $field[\'std\'], \'" size="30" style="width:97%" />\', \'\', $field[\'desc\'];
                    break;     
                case \'textarea\': // the HTML to display for type=textarea options
                    echo \'<textarea name="\', $field[\'id\'], \'" id="\', $field[\'id\'], \'" cols="60" rows="8" style="width:97%">\', $meta ? $meta : $field[\'std\'], \'</textarea>\', \'\', $field[\'desc\'];
                    break;
                case \'select\': // the HTML to display for type=select options
                    echo \'<select name="\', $field[\'id\'], \'" id="\', $field[\'id\'], \'">\';
                    foreach ($field[\'options\'] as $option) {
                        echo \'<option\', $meta == $option ? \' selected="selected"\' : \'\', \'>\', $option, \'</option>\';
                    }
                    echo \'</select>\';
                    break;
                case \'radio\': // the HTML to display for type=radio options
                    foreach ($field[\'options\'] as $option) {
                        echo \'<input type="radio" name="\', $field[\'id\'], \'" value="\', $option[\'value\'], \'"\', $meta == $option[\'value\'] ? \' checked="checked"\' : \'\', \' />\', $option[\'name\'];
                    }
                    break;
                case \'checkbox\': // the HTML to display for type=checkbox options
                    echo \'<input type="checkbox" name="\', $field[\'id\'], \'" id="\', $field[\'id\'], \'"\', $meta ? \' checked="checked"\' : \'\', \' />\';
                    break;
            }
            echo     \'<td>\',
                \'</tr>\';
        }
    echo \'</table>\';
}

我发现了错误！

foreach ((array)$meta_b[\'args\'][\'fields\'] as $field) {

foreach ((array)$meta_b[\'arg\'][\'fields\'] as $field) {

现在如何保存post数据？

这是我的代码：

function ri_meta_save_data($post_id) {
    global $post;

    // check autosave
    if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE) {
        return $post_id;
    }

    // verify nonce -- checks that the user has access
    if (!wp_verify_nonce($_POST[\'ri_meta_box_nonce\'], basename(__FILE__))) {
        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;
    }

    foreach ((array)$meta_b[\'args\'][\'fields\'] as $field) {
        $old = get_post_meta($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);
        }
    }
}