PHP-从对象数组中提取属性 [英] PHP - Extracting a property from an array of objects

问题描述

我有一系列猫对象:

$cats = Array
    (
        [0] => stdClass Object
            (
                [id] => 15
            ),
        [1] => stdClass Object
            (
                [id] => 18
            ),
        [2] => stdClass Object
            (
                [id] => 23
            )
)

，我想在1行中提取猫的ID数组(而不是函数或循环).

and I want to extract an array of cats' IDs in 1 line (not a function nor a loop).

我当时正在考虑将array_walk与create_function一起使用，但是我不知道该怎么做.

I was thinking about using array_walk with create_function but I don't know how to do it.

有什么主意吗?

推荐答案

如果您具有 PHP 5.5或更高版本，最好的方法是使用内置函数array_column():

If you have PHP 5.5 or later, the best way is to use the built in function array_column():

$idCats = array_column($cats, 'id');

但是儿子必须是数组或转换为数组

But the son has to be an array or converted to an array

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