用非数字键删除数组的所有元素 [英] Remove all elements of an array with non-numeric keys

问题描述

我有一个看起来像这样的数组:

I have an array that looks something like this:

Array
(
    [0] => apple
    ["b"] => banana
    [3] => cow
    ["wrench"] => duck
)

我想使用该数组并使用array_filter或类似的方法来删除具有非数字键的元素并接收以下数组:

I want to take that array and use array_filter or something similar to remove elements with non-numeric keys and receive the follwoing array:

Array
(
    [0] => apple
    [3] => cow
)

我正在考虑这个问题，我想不出一种解决方法，因为array_filter不能为我的函数提供键，而array_walk无法修改数组结构(在PHP手册中已提及).

I was thinking about this, and I could not think of a way to do this because array_filter does not provide my function with the key, and array_walk cannot modify array structure (talked about in the PHP manual).

推荐答案

在这种情况下，使用 foreach 循环将是合适的:

Using a foreach loop would be appropriate in this case:

foreach ($arr as $key => $value) {
    if (!is_int($key)) {
        unset($arr[$key]);
    }
}

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