Php 如何内爆多维数组

我正在尝试内爆此阵列：

$name;
foreach ($childs as  $cval) {
  $name[] = $cval;
}

下面是我得到的：

Array
(
[0] => Array
    (
        [0] => Array
            (
                [pages_name] => services child 1
            )

        [1] => Array
            (
                [pages_name] => services child 2
            )

    )

[1] => Array
    (
        [0] => Array
            (
                [pages_name] => inner service child 1
            )

        [1] => Array
            (
                [pages_name] => inner service child 2
            )

    )

[2] => Array
    (
        [0] => Array
            (
                [pages_name] => gallery child 1
            )

        [1] => Array
            (
                [pages_name] => gallery child 2
            )

    )

)

我用

array\u map

这样做：

$arr = array_map(function($el){ return $el['pages_name']; }, $name);

$str = implode(',', $arr);

我得到了这个错误：

Undefined index: pages_name

---

您忘记了深度级别，请尝试以下操作：

$arr = array_map(function($el){ return $el[0]['pages_name']; }, $name);