如何在不知道键的情况下读取嵌套数组值?

问题描述：

我是数组新手.我希望打印出所有可能的 [type] [label] [value] 的值.我希望喜欢如果有一个带有select的类型，然后显示所有带有值的标签"

I'm new in array. I wish to print out the values of all possible [type] [label] [value]. I wish to do like "if there's a type with select, then display all labels with values"

下面是我的数组.

Array

    (
        [product_id] => 8928
        [title] => Example of a Product
        [groups] => Array
            (
                [8929] => Array
                    (
                        [8932] => Array
                            (
                                [type] => select
                                [label] => Section
                                [id] => pewc_group_8929_8932
                                [group_id] => 8929
                                [field_id] => 8932
                                [value] => Section 200
                                [flat_rate] => Array
                                    (
                                    )

                            )

                    )

            )

        [price_with_extras] => 0
        [products] => Array
            (
                [field_id] => pewc_group_8929_9028
                [child_products] => Array
                    (
                        [8945] => Array
                            (
                                [child_product_id] => Array
                                    (
                                        [0] => 8945
                                    )

                                [field_id] => pewc_group_8929_9028
                                [quantities] => one-only
                                [allow_none] => 0
                            )

                    )

                [pewc_parent_product] => 8928
                [parent_field_id] => pewc_5d678156d81c6
            )

    )

该网站说看起来您的帖子大部分是代码；请添加更多详细信息."因此，这就是我所谓的lorem ipsum:D

The site is saying " It looks like your post is mostly code; please add some more details." So here's my so-called lorem ipsum :D

答

您可以使用 array_walk_recursive 相同，

array_walk_recursive($arr, function ($value, $key) {
    // check if key matches with type, label or value
    if (count(array_intersect([$key], ['type', 'label', 'value'])) > 0) {
        echo "[$value] ";
    }
});

演示

输出

[select] [Section] [Section 200]

编辑

您可以将条件修改为

if($ key ==='type'&& $ value =='select')

编辑1

array_walk_recursive($arr, function ($value, $key) {
    if($key === 'type' && $value == 'select'){
        echo "[$value] ";
    }
});

编辑2

function search_by_key_value($arr, $key, $value)
{
    $result = [];
    if (is_array($arr)) {
        if (isset($arr[$key]) && $arr[$key] == $value) {
            $result[] = $arr;
        }
        foreach ($arr as $value1) {
            $result = array_merge($result, search_by_key_value($value1, $key, $value));
        }
    }
    return $result;
}
// find array by key = type and value = select
$temp = search_by_key_value($arr, 'type', 'select');
$temp = array_shift($temp);
print_r($temp);
echo $temp['label'];
echo $temp['value'];

演示

如何在不知道键的情况下读取嵌套数组值?

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