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@ 2017-07-03T14:29:33Z

<?php

$mapping = [
    "AccountId" => "id",
    "Street" => "street_name",
    "Country" => "country",
    "Contacts" => "contacts",
    "Id" => "contact_id",
    "Name" => "name"
];

$input2 = [
    "AccountId" => "18",
    "Street" => "Some Street 123",
    "Country" => "England",
    "Contacts" => [
       [
          "Id" => "1234",
          "Name" => "John Doe"
       ]
    ]
];

function mapArray($mapping, $input) {
    $output = [];
    foreach ($mapping as $from => $to) {
        if (array_key_exists($from, $input)) {
            if (is_array($input[$from])) {
                $output[$to] = mapArray($mapping, $input[$from]);
            } else {
                echo $input[$from];
                $output[$to] = $input[$from];
            }
        }
    }
    return $output;
}

$output2 = mapArray($mapping, $input2);

var_dump($output2);

Output for git.master, git.master_jit, rfc.property-hooks: 18Some Street 123Englandarray(4) { ["id"]=> string(2) "18" ["street_name"]=> string(15) "Some Street 123" ["country"]=> string(7) "England" ["contacts"]=> array(0) { } }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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