遍历多维数组 [英] Traverse multi-dimensional array

问题描述

具有下面的数组，需要访问id，但无法使其正常工作.不知道如何访问数组的第3级.

Have the array below and need to access id but can't get it to work. Don't know how to access 3rd level of array.

Array
(
[0] => Array
    (
        [0] => Array
            (
                [id] => 1
            )

    )

[1] => Array
    (
        [0] => Array
            (
                [id] => 2
            )

    )

[2] => Array
    (
        [0] => Array
            (
                [id] => 3
            )

    )

[3] => Array
    (
    )

[4] => Array
    (
        [0] => Array
            (
                [id] => 5
            )

    )
}

推荐答案

在您的示例中，似乎id始终与key of 0;

In your example it looks as though id is always in a separate array with the key of 0;

1，硬编码:

foreach($array as $value){
    echo isset($value[0]['id']) ? $value[0]['id'] : '';
}

2，遍历第二个数组:

2, iterate though second array:

foreach($array as $key=>$value){
    if(is_array($value)){
        foreach($value as $v){
            if(isset($v['id'])){
                echo $v['id'];
            }
        }
    }
}

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