WordPress就是这样保存我的CPT元数据的：

 array(8) {    
 ["product_id"]=> array(1) { [0]=> string(10) "abcdefg987" }  
 ["end_date"]=> array(1) { [0]=> string(10) "02-02-2015" }  
 } 

但我希望它是这样的：

 array(8) {    
 ["product_id"]=>  "abcdefg987" ,
 ["end_date"]=>  "02-02-2015"   
 } 

那么，有可能吗？

这是我的一些代码：
to save:
update_post_meta($post_id, "end_date", $_POST["end_date"]);
The meta box:

global $post;
$custom = get_post_custom($post->ID);  
$end_date = $custom["end_date"][0]; // <- this was an old hack to this problem  
<p><label>End Date:</label><br />  
<input name="end_date" value="<?php echo $end_date; ?>"></input></p>

<小时>What I really want to do ?
我需要的是获得“end\\u date”大于今天的帖子（自定义）。因此，我有一个meta\\u查询，但不起作用，因为还会显示带有“end\\u date”的帖子<；今天，我想是因为它在数组中得到了它的值，而不仅仅是值，下面是代码：

$args = array(
    \'post_type\' => \'myEventCPT\',
    \'meta_query\' => array(
            array(  \'meta_key\' => \'end_date\',
                    \'value\' => date("m-d-Y"), // Set today\'s date 
                    \'compare\' => \'>=\', 
                    //\'type\' => \'DATE\'
            )
    )
);  
$my_event_post = get_posts( $args );

$args = array(
    \'numberposts\' => 1,
    \'post_type\' => \'my-cpt\',
    \'order\' => \'ASC\' ,
    \'meta_query\' => array(
            \'relation\' => \'AND\',
            array(  \'key\' => \'end_date\',
                    \'value\' => date("Y-m-d"), //today
                    \'compare\' => \'>=\', 
                    \'type\' => \'DATE\'
            ),
            array(  \'key\' => \'product_id\',
                    \'value\' => $product[\'id\'],
                    \'compare\' => \'=\',
                    \'type\' => \'CHAR\'
            ),  
    ),
);