php - 如何使用字符串作为数组索引路径来检索值？

Question

假设我有一个像这样的数组:

Array
(
    [0] => Array
        (
            [Data] => Array
                (
                    [id] => 1
                    [title] => Manager
                    [name] => John Smith
                )
         )
    [1] => Array
        (
            [Data] => Array
                 (
                     [id] => 1
                     [title] => Clerk
                     [name] =>
                         (
                             [first] => Jane
                             [last] => Smith
                         )
                 )

        )

)

我希望能够构建一个函数，我可以将一个字符串传递给该函数，该函数将充当数组索引路径并返回适当的数组值，而无需使用 eval()。这可能吗？

function($indexPath, $arrayToAccess)
{
    // $indexPath would be something like [0]['Data']['name'] which would return 
    // "Manager" or it could be [1]['Data']['name']['first'] which would return 
    // "Jane" but the amount of array indexes that will be in the index path can 
    // change, so there might be 3 like the first example, or 4 like the second.

    return $arrayToAccess[$indexPath] // <- obviously won't work
}

Answer 1

稍后，但是...希望对某人有所帮助:

// $pathStr = "an:string:with:many:keys:as:path";
$paths = explode(":", $pathStr); 
$itens = $myArray;
foreach($paths as $ndx){
    $itens = $itens[$ndx];
}

现在 itens 是您想要的数组的一部分。

[]的

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