Question

我有一个像这样的数组

Array 
( 
    [0] => Array 
    ( 
        [id] => 1 [children] => Array 
        ( 
            [0] => Array 
            ( 
                [id] => 2 [children] => Array 
                ( 
                    [0] => Array 
                    ( 
                        [id] => 3 [children] => Array 
                        ( 
                            [0] => Array 
                            ( 
                                [id] => 4 
                            ) 
                        ) 
                    ) 
                ) 
            ) 
        ) 
    ) 
    [1] => Array ( 
        [id] => 5 
    ) 
    [2] => Array 
    ( 
        [id] => 6 
    ) 
    [3] => Array 
    ( 
        [id] => 7 
    ) 
    [4] => Array 
    ( 
        [id] => 8 
    ) 
    [5] => Array 
    ( 
        [id] => 9 
    ) 
)

这是动态生成的数组，我需要一个函数以该数组作为输入并返回每个ID及其父ID

根据此数组，id 2是id 1的孩子，id 3是id 3的孩子，而id 4是id 3的孩子

最终结果ID 1是ID 2的父级，ID 2是ID 3的父级，ID 3是ID 4的父级，ID 5-9没有父级，因此它们的默认值为0

Answer 1

除了您自己没有付出任何努力外，我还是会发布解决方案，以防有人不知道使用PHP的RecursiveIteratorIterator

样本数据：

$arrData = [
    [
        'id' => 1,
        'children' => [
            'id' => 2,
            'children' => [
                'id' => 3,
                'children' => [
                    'id' => 4
                ]
            ]
        ]
    ],
    [
        'id' => 5
    ],
    [
        'id' => 6
    ],
    [
        'id' => 7
    ],
    [
        'id' => 8
    ],
    [
        'id' => 9
    ],
];

使用PHP内置的int迭代器类

$arrDataConverted = [];

$iterator = new RecursiveIteratorIterator(new RecursiveArrayIterator($arrData));
foreach($iterator AS $key => $value)
{
    $arrParentdata = $iterator->getSubIterator($iterator->getDepth()-1);

    $arrItem = [
        'id' => $value,
        'parent' => (isset($arrParentdata['id']))  ?    $arrParentdata['id']   :   0
    ];
    $arrDataConverted[] = $arrItem;
}

print_r($arrDataConverted);

将多维数组转换为简单数组

1 个答案: