从响应对象访问 created_on - 获取文件操作 PODIO API

Access created_on from response object - get file action PODIO API

大家好,我正在尝试使用下面的代码访问 created_on 对象,但它不起作用,我得到的日期 January 1, 1970 12:00 不正确。也试过

$item = PodioItem::get($item_id);
$file_id = "";
$created_on = "";
foreach ($item->files as $file) {
echo date('F j, Y h:i',strtotime($file->created_on))."<br>"; 
}

下面是来自 print_r($file,true) 的响应对象,我可以像 $file->file_id, $file->link 一样毫无问题地访问另一个对象。我想要完成的是将 created_on 数据存储在一个变量中,然后创建一个函数来检查和获取最新日期,然后获取它的 file_id

 PodioFile Object

 [__attributes:PodioObject:private] => Array
        (
            [file_id] => 464714088
            [link] => https://files.podio.com/464714088
            [perma_link] => 
            [thumbnail_link] => 
            [hosted_by] => podio
            [name] => KEjj4UQSUV.PDF
            [description] => 
            [mimetype] => application/pdf
            [size] => 785849
            [created_on] => 2017-12-08 23:03:36
            [rights] => Array
                (
                    [0] => download
                    [1] => view
                    [2] => delete
                    [3] => update
                )

 PodioFile Object
(
    [__attributes:PodioObject:private] => Array
        (
            [file_id] => 464716575
            [link] => https://files.podio.com/464716575
            [perma_link] => 
            [thumbnail_link] => 
            [hosted_by] => podio
            [name] => IiaCfJjwws.PDF
            [description] => 
            [mimetype] => application/pdf
            [size] => 785849
            [created_on] => 2017-12-08 23:15:30
            [rights] => Array
                (
                    [0] => download
                    [1] => view
                    [2] => delete
                    [3] => update
                )

PodioFile Object
(
    [__attributes:PodioObject:private] => Array
        (
            [file_id] => 464728331
            [link] => https://files.podio.com/464728331
            [perma_link] => 
            [thumbnail_link] => 
            [hosted_by] => podio
            [name] => g6cmAeUCiV.PDF
            [description] => 
            [mimetype] => application/pdf
            [size] => 785849
            [created_on] => 2017-12-08 23:49:15
            [rights] => Array
                (
                    [0] => download
                    [1] => view
                    [2] => delete
                    [3] => update
                )

幸运地在此处提供的示例中找到了答案 - https://hotexamples.com/examples/-/PodioItem/filter/php-podioitem-filter-method-examples.html

date_format($file->created_on, 'Y/m/d H:i:s') 成功了