Question

我有一个多维数组，可能包含或不包含键name一次或多次。我想做的是，对于所述元素的每个实例，使用键key在该元素旁边插入另一个元素。

所以，给定这个数组：

[
    [
        'noname' => 'No name',
        'label' => 'I have no name'
    ],
    [
        'name' => 'foo',
        'label' => 'Foo',
        'fields' => [
            [
                'name' => 'bar',
                'label' => 'Bar'
            ]
        ]
    ],
    [
        'name' => 'baz',
        'label' => 'Baz'
    ]
]

我想要以下输出：

[
    [
        'noname' => 'No name',
        'label' => 'I have no name'
    ],
    [
        'name' => 'foo',
        'key' => 'foo-key', # This is inserted by the function
        'label' => 'Foo',
        'fields' => [
            [
                'name' => 'bar',
                'key' => 'bar-key', # This is inserted by the function
                'label' => 'Bar'
            ]
        ]
    ],
    [
        'name' => 'baz',
        'key' => 'baz-key', # This is inserted by the function
        'label' => 'Baz'
    ]
]

我已查看array_walk_recursive但无法让它发挥作用。我是否需要编写自己的递归函数，或者是否有适合我的内置函数？

Answer 1

您的代码将是这样的：

<?php
$array = [
    [
        'noname' => 'No name',
        'label' => 'I have no name'
    ],
    [
        'name' => 'foo',
        'label' => 'Foo',
        'fields' => [
            [
                'name' => 'bar',
                'label' => 'Bar'
            ]
        ]
    ],
    [
        'name' => 'baz',
        'label' => 'Baz'
    ]
];

function fix_array($array){
    foreach ($array as $key => $value){
        if (is_array($value)){
            $array[$key] = fix_array($value);
        }
        elseif ($key == 'name'){
            $array['key'] = $value . '-key'; 
        }
    }
    return $array;
}

$new_array = fix_array($array);

print_r($new_array);

递归地在元素中的其他元素旁边插入元素

1 个答案: