我正在与一个食谱博客合作，我使用自定义元框。

$food_box = array(
    \'id\' => \'foodbox\',
    \'title\' => __(\'Ingredients details\',\'splus\'),
    \'page\' => \'recipes\',
    \'context\' => \'normal\',
    \'priority\' => \'high\',
    \'fields\' => array(),);
$arr = array ( \'name\' => \'-\', \'desc\' => \'-\', \'id\' => \'-\',\'type\' => \'text\', \'std\' => \'\');
add_action(\'admin_menu\', \'mytheme_add_box\');  // Add meta box

function mytheme_add_box() {
    global $meta_box;
    global $food_box;
    global $test_box;
    add_meta_box(
        $meta_box[\'id\'], 
        $meta_box[\'title\'], 
        \'recipe_details_show_box\', 
        $meta_box[\'page\'], 
        $meta_box[\'context\'], 
        $meta_box[\'priority\']
    );
    add_meta_box(
        $food_box[\'id\'], 
        $food_box[\'title\'], 
        \'ingredients_show_box\', 
        $food_box[\'page\'], 
        $food_box[\'context\'], 
        $food_box[\'priority\']
    );
}

A根据配方将配料分为几组食物，同一食物可以在一个配方中出现两次（例如，面团中的糖为200克，馅料中的糖为50克）。为了结合两种分类法（食物项目和食物集），我创建了自定义表并添加了文件$food_box[\'fields\'][] = $arr; 按下一代码从此表中删除：

foreach ( $terms as $term ) { // show tabs content for foodset
    $s = ($i==1) ? \' \': \' style="display: none;"\';
    echo \'<div id="set-\'.$term->term_id .\'" class="tabs-panel"\' . $s . \'>\';
        echo \'<ul id="set2-checklist" class="categorychecklist form-no-clear" >\';
            echo \'<table id="food_data_table_header" class="form-table" border="0" align="left">\';
            echo \'<tr>\';   //show header
                echo \'<td style="width: 50%" >  <span>FoodSet</span>        </td>\';
                echo \'<td style="width: 50%" >  <span>FoodId</span>     </td>\';
                echo \'<td style="width:100%" >  <span>Description</span>    </td>\';
                echo \'<td style="width: 50%" >  <span>FoodUnit</span>       </td>\';
                echo \'<td style="width: 50%" >  <span>Quantity</span>       </td>\';
                echo \'<td style="width: 50%" >  <span>Order</span>      </td>\';
                echo \'<td style="width:100%" >  <span>Comment</span>        </td>\';
            echo \'</tr>\';
            foreach ( $foods as $food ) {       //show data
                $food_row = $wpdb->get_row($wpdb->prepare(
                    "SELECT rf.post_id, rf.foodset_id, rf.food_id, tt1.description, rf.food_unit, rf.quantity, rf.food_order, rf.food_comment
                       FROM $wpdb->term_taxonomy tt1 JOIN $wpdb->recipefood rf ON rf.food_id = tt1.term_id
                      WHERE (rf.post_id=".$post_id.") AND (rf.foodset_id=".$term->term_id.") AND (rf.food_id=".$food->term_id.")"));
                $food_set = $term->term_id;
                $food_id = $food->term_id;
                $id = $food_set . \'-\' . $food_id;
                $food_name = $food_row->description;

    echo \'<tr>\';
    echo \'<td>\',$food_set,\'</td>\';
    echo \'<td>\',$food_id,\'</td>\';
    echo \'<td>\',$food_name,\'</td>\';
    $fls = array (\'food_unit\',\'quantity\',\'food_order\',\'food_comment\');
    foreach ($fls as $fl) {
        switch ($fl) {
        case \'food_unit\':
        $def_val = $def_unit; break;
        case \'quantity\':
        $def_val = $def_qty; break;
        case \'food_order\':
        $def_val = \'1\'; break;
        case \'food_comment\':
        $def_val = \'comment\'; break;
    }
    $meta = ($food_row->$fl == \'\') ? $def_val : $food_row->$fl;
    $arr = array ( \'name\' => $fl.\'-\'. $id, \'desc\' => $fl.\'-\'. $id, \'id\' => $fl.\'-\'. $id,\'type\' => \'text\', \'std\' => $meta);
    $food_box[\'fields\'][] = $arr; //add new field to array
    echo \'<td>\',\'<input type="text" name="\'.$fl.\'-\'.$id. \'" id="\'.$fl.\'-\'.$id.\'" value="\',$meta , \'" style="width: 50%"/>\', \'</td>\';
    // $meta ? $meta : $food_box[$fl.\'-\'.$id][\'std\']
}
echo \'</tr>\';

但很遗憾，我无法将更新的数据保存为$_POST[\'quantity-708-481\'] 为空且未在中定义

add_action(\'save_post\', \'mytheme_save_data\');   // Save recipe post from meta box
function mytheme_save_data($post_id) {
        global $meta_box, $food_box;
        //...
        $wpdb->update( $wpdb->recipefood,
        array( //set
            \'food_comment\' =>  $_POST[\'quantity-708-481\']
        ), array( //where
            \'post_id\' => \'1\',
            \'foodset_id\' => \'822\',
            \'food_id\' => \'484\'
        ) 
    );

换句话说，该字段添加到元框中，但在保存期间不可见。任何建议都是非常受欢迎的。