PHP

Question

我有一个索引数组，其中包含任意数量的嵌套关联数组或索引数组。我需要在每个数组中递归地插入一个新的 key/value 对 'apple' 如果它包含一个键 'banana'.

$original = [
    0 => [
        'something1' => 'something',
        'banana' => 'yellow',
        'something2' => [
            'something3' => 'something',
            'something4' => [
                'something5' => 'something',
                'banana' => 'yellow',
                'something6' => [
                    'banana' => 'yellow',
                ]
            ],
            'banana' => 'yellow',
        ],
        'something7' => [
            0 => [
                'something8' => 'something',
                'banana' => 'yellow',
            ],
        ],
    ],
    1 => [
        'something9' => 'something',
        'banana' => 'yellow',
    ],
    2 => [
        'something10' => 'something',
    ],
];

这是预期的结果 - 'apple' 不必紧挨着 'banana' 插入，它可以位于同一级别数组中的任何位置，只要它是 [ 的兄弟项即可=21=].

$new = [
    0 => [
        'something1' => 'something',
        'banana' => 'yellow',
        'apple' => 'red',
        'something2' => [
            'something3' => 'something',
            'something4' => [
                'something5' => 'something',
                'banana' => 'yellow',
                'apple' => 'red',
                'something6' => [
                    'banana' => 'yellow',
                    'apple' => 'red',
                ]
            ],
            'banana' => 'yellow',
            'apple' => 'red',
        ],
        'something7' => [
            0 => [
                'something8' => 'something',
                'banana' => 'yellow',
                'apple' => 'red',
            ],
        ],
    ],
    1 => [
        'something9' => 'something',
        'banana' => 'yellow',
        'apple' => 'red',
    ],
    2 => [
        'something10' => 'something',
    ],
];

我能找到关于如何在平面数组中的某个键后插入 key/value 对的答案，但找不到在多维数组中递归这样做的答案。

Answer 1

    $original = [
    0 => [
        'something1' => 'something',
        'banana' => 'yellow',
        'something2' => [
            'something1' => 'something',
            'something2' => [
                'something1' => 'something',
                'banana' => 'yellow',
                'something2' => [
                    'banana' => 'yellow',
                ]
            ],
            'banana' => 'yellow',
        ],
        'something3' => [
            0 => [
                'something' => 'something',
                'banana' => 'yellow',
            ],
        ],
    ],
    1 => [
        'something' => 'something',
        'banana2' => 'yellow',
    ],
];

function ins_value_to_arr(&$arr, $insVal = [] , $sibling = NULL){
    static  $ins; 
    static $sib;
    if($insVal){
        $ins = $insVal;
        $sib = $sibling;
    }
    $merge = false;
    foreach($arr as $k => &$val){
        if(is_array($val)){
           ins_value_to_arr($val); 
        }
        if($k == $sib){
            $merge = true;
        }
    }
    if($merge){
        $arr = array_merge($arr,$ins);
    }
    
    return $arr;
}

// call -> ins_value_to_arr($original,['apple' => 'red'],'banana');

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