php - 对 stdClass 对象使用 array_walk_recursive()

Question

我在这里查看了一些答案，但似乎没有使用这种方法？

我有一个项目数组，这些项目是对象。该对象可以有一个键，它是“孩子”，“孩子”是一个对象数组等。

有没有办法做到这一点？

例子：

    Array
    (
        [1] => stdClass Object
            (
                [id] => 1
                [name] => Steve King
                [image] => upload/shop/fe7a66254e4249af2b0093efca75a914.jpg
                [parent] => 0
                [children] => Array
                    (
                    )

            )

        [2] => stdClass Object
            (
                [id] => 2
                [name] => Eden Hall
                [image] => upload/shop/064f60a98deba612e437ac549f1dc05d.jpg
                [parent] => 0
                [children] =>Array
                    (
                        [1] => stdClass Object
                            (
                              [id] => 1
                              [name] => Steve King
                              [image] => upload/shop/fe7a66254e4249af2b0093efca75a914.jpg
                              [parent] => 0
                              [children] => Array
                                  (
                                  )

                   )
            )
        [3] => stdClass Object
            (
                [id] => 3
                [name] => Paula Johnson
                [image] => upload/shop/1492a323090afbad07c35cf93fe6bdda.jpg
                [parent] => 0
                [children] => Array
                    (
                    )

            )

        [4] => stdClass Object
            (
                [id] => 4
                [name] => Ethan Watson
                [image] => upload/shop/677c720333af33bc58d0684d79918e03.jpg
                [parent] => 0
                [children] => Array
                    (
                    )

            )

        [5] => stdClass Object
            (
                [id] => 5
                [name] => Abigail Adams
                [image] => upload/shop/da1734277322fc3b2e84a9ddbcc2e2f1.jpg
                [parent] => 0
                [children] => Array
                    (
                    )

            )

Answer 1

在 下分配一个对象数组$array。

解决方案 1： json_encode将对象数组设为 a json，然后将 a 转换json为associative array.

$result=json_decode(json_encode($array),true);
array_walk_recursive($result, function($value,$key){
    print_r($value);
    print_r($key);
});

解决方案 2： 遍历数组并将每个类型转换object为array.

array_walk($array,function(&$value,$key){
    $value=(array) $value;
});
array_walk_recursive($array, function($value,$key){
    print_r($value);
    print_r($key);
});

Answer 2

您始终可以为某些数据结构实现自定义递归迭代器。它可以是一个更灵活的解决方案。例如：

class MyIterator extends \IteratorIterator implements 
\RecursiveIterator
{
    public function hasChildren()
    {
        $current = $this->current();

        if (is_array($current) and $this->key() === 'children') {
            return true;
        }

        return is_object($current);
    }

    public function getChildren()
    {
        /* $current is array (for key 'children') or \stdClass obj*/

        $current = $this->current();

        return new MyIterator(new \ArrayObject($current));
    }
}

$rii = new \RecursiveIteratorIterator(new MyIterator(new 
\ArrayObject($data)));

foreach ($rii as $key => $value) {
    print_r($key);
    print_r($value);
}