重命名多维数组php的索引键答案

【问题标题】：Rename index key of multi-dimensional array php重命名多维数组php的索引键
【发布时间】：2021-05-25 08:35:46
【问题描述】：

我下面有一个多维数组，我想把所有conditions键改成new_child

Array
(
    [0] => Array
        (
            [type] => MagentoCatalogRuleModelRuleConditionCombine
            [aggregator] => all
            [conditions] => Array
                (
                    [0] => Array
                        (
                            [type] => MagentoCatalogRuleModelRuleConditionCombine
                            [attribute] => category_ids
                            [conditions] => Array
                                (
                                    [0] => Array
                                        (
                                            [type] => MagentoCatalogRuleModelRuleConditionProduct
                                            [attribute] => category_ids
                                        )
                                    [1] => Array
                                        (
                                            [type] => MagentoCatalogRuleModelRuleConditionProduct
                                            [attribute] => category_ids
                                        )
                                )
                        )
                )
        )
    [1] => Array
        (
            [type] => MagentoCatalogRuleModelRuleConditionCombine
            [aggregator] => all
            [conditions] => Array
                (
                    [0] => Array
                        (
                            [type] => MagentoCatalogRuleModelRuleConditionProduct
                            [attribute] => category_ids
                        )
                )
        )
)

我的预期结果是这样的：

Array
(
    [0] => Array
        (
            [type] => MagentoCatalogRuleModelRuleConditionCombine
            [aggregator] => all
            [new_child] => Array          //change will be made here
                (
                    [0] => Array
                        (
                            [type] => MagentoCatalogRuleModelRuleConditionCombine
                            [attribute] => category_ids
                            [new_child] => Array          //change will be made here
                                (
                                    [0] => Array
                                        (
                                            [type] => MagentoCatalogRuleModelRuleConditionProduct
                                            [attribute] => category_ids
                                        )
                                    [1] => Array
                                        (
                                            [type] => MagentoCatalogRuleModelRuleConditionProduct
                                            [attribute] => category_ids
                                        )
                                )
                        )
                )
        )
    [1] => Array
        (
            [type] => MagentoCatalogRuleModelRuleConditionCombine
            [aggregator] => all
            [new_child] => Array               //change will be made here
                (
                    [0] => Array
                        (
                            [type] => MagentoCatalogRuleModelRuleConditionProduct
                            [attribute] => category_ids
                        )
                )
        )
)

我尝试了递归函数，但它不起作用。它只改变父数组，仍然不改变子数组中的键名。

这是我的代码

function convert($input) {
    foreach ( $input as $k => &$v )
    {
        if (array_key_exists('conditions', $input[$k])) {
            $input[$k]['new_child'] = $input[$k]['conditions'];
            unset($input[$k]['conditions']);
            convert($input[$k]['new_child']);
        }
        
    }
    return $input;
}
print_r(convert($input));

【问题讨论】：

标签： php arrays recursion

【解决方案1】：

问题是，您没有使用 convert 递归调用的结果。您应该能够通过这样做来修复您的代码：

function convert($input) {
    foreach ( $input as $k => $v )
    {
        if (array_key_exists('conditions', $input[$k])) {
            $input[$k]['new_child'] = convert($input[$k]['conditions']);
            unset($input[$k]['conditions']);
        }
        
    }
    return $input;
}

【讨论】：

【解决方案2】：

你的函数逻辑没问题，但你需要通过引用传递$input参数：

function convert(&$input) {
   ...
}

【讨论】：