PHP对象数组-尝试提取密钥 [英] PHP array of objects - trying to extract key

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

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