PHP对象数组

本文介绍了PHP对象数组-尝试提取密钥的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在收到这样的WooCommerce订单产品meta_data ...

I am getting a WooCommerce order product meta_data like this...

$item_meta_data = $item_values->get_meta_data();

这给了我以下...

WC_Meta_Data Object ( [current_data:protected] => Array ( [id] => 8795 [key] => Option 1 [value] => Yes ) [data:protected] => Array ( [id] => 8795 [key] => Option 1 [value] => Yes ) )

我对返回的数据感到困惑，我想检查是否设置了选项1，我试图获取像这样的密钥...

I am confused about the data that is returned, I want to check if Option 1 is set, I have tried to get the key like this...

foreach($item_meta_data as $meta_data_item) { echo $meta_data_item['key']; }

但是这不起作用，因为它不是数组，任何人有什么想法吗?

But this is not working as it is not an array, anyone any ideas?

推荐答案

在 WC_Meta_Data 类中有一个魔术方法，名为 __ get .

There is a magic method in WC_Meta_Data class named __get .

因此您可以访问受保护的属性.例如:

So you can access protected properties. For example:

$item_meta_data->key