我最近从themeforest购买了一个主题，它有一个自定义的帖子类型。以下是指向使用自定义帖子类型创建的页面的链接：

http://bluepresley.com/farmerfinder/?dir-item=dance-relax

自定义post类型有大约20个不同的自定义字段，但您可以从我的数组转储中看到，one one字段已保存为序列化数据：

（使用get\\u post\\u custom（）进行数组转储）

Array
(
    [_edit_last] => Array
        (
            [0] => 1
        )

    [_ait-dir-item] => Array
        (
            [0] => a:20:{s:7:"address";s:51:"276 Canal Street, New York, NY 10013, United States";s:11:"gpsLatitude";s:17:"40.71958306715651";s:12:"gpsLongitude";s:17:"-74.0379810333252";s:14:"showStreetview";a:1:{s:6:"enable";s:6:"enable";}s:18:"streetViewLatitude";s:9:"40.719679";s:19:"streetViewLongitude";s:18:"-74.03797400000002";s:17:"streetViewHeading";s:18:"-151.8987176681924";s:15:"streetViewPitch";s:17:"5.196265482127373";s:14:"streetViewZoom";s:1:"0";s:9:"telephone";s:13:"044 802 52578";s:5:"email";s:19:"[email protected]";s:3:"web";s:17:"www.aitthemes.com";s:11:"hoursMonday";s:9:"8am - 8pm";s:12:"hoursTuesday";s:9:"8am - 8pm";s:14:"hoursWednesday";s:9:"8am - 8pm";s:13:"hoursThursday";s:9:"8am - 8pm";s:11:"hoursFriday";s:9:"8am - 8pm";s:13:"hoursSaturday";s:6:"closed";s:11:"hoursSunday";s:6:"closed";s:18:"alternativeContent";s:33:"What goes in alternative content?";}
        )

    [_thumbnail_id] => Array
        (
            [0] => 8159
        )

    [_edit_lock] => Array
        (
            [0] => 1409208357:1
        )

    [slide_template] => Array
        (
            [0] => 
        )
)

请注意，有问题的密钥是\\u ait-dir-item。

我注意到在表单本身中，所有表单字段都被命名为name="_ait-dir-item[address]" （例如）。

如果是这种情况，如何以编程方式添加项？这是典型的Wordpress吗？有没有办法处理这种方法？我想我不能使用add_post_meta( $post_id, \'mymetakey\', $my_long ); 或找到其他方法here 和here. ?

$metaarray = maybe_unserialize(get_post_meta($post_id,\'_ait-dir-item\',TRUE));
//now $metaarray has an array, if it is serialized. If not, $metaarray has a string.
if(is_array($metaarray)){
     $metaarray[\'mynewfield\'] = \'Some text i need to add\';
     $metaarray[\'mysecondnewfield\'] = array(\'an\' => \'array\',\'i\' => \'need\', \'to\' => \'add\');
}
update_post_meta($post_id,\'_ait-dir-item\',maybe_serialize($metaarray));