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@ 2014-06-18T09:12:24Z

<?php
function arrayMergeRecursive($arraySource, $arrayDestination) {

    $temp = array();
    foreach ($arraySource as $key => $value) {

        if (is_array($value)) {

            $associatedDestination = array();
            if (isset($arrayDestination[$key])) {
                $associatedDestination = $arrayDestination[$key];
            }

            $temp[$key] = arrayMergeRecursive($value, $associatedDestination);

            continue;
        }

        if (isset($arrayDestination[$key])) {
            $temp[$key] = $arrayDestination[$key];
        } else {
            $temp[$key] = $arraySource[$key];
        }
    }

    return $temp;
}

$source = ["a" => 1, "b" => 2, "c" => ["x" => 1, "y" => 2]];

$x = ["c" => 1, "d" => 10, "a" => 5];

var_dump(arrayMergeRecursive($source, $x));

var_dump(array_replace_recursive($source, $x));

Output for git.master, git.master_jit, rfc.property-hooks: array(3) { ["a"]=> int(5) ["b"]=> int(2) ["c"]=> array(2) { ["x"]=> int(1) ["y"]=> int(2) } } array(4) { ["a"]=> int(5) ["b"]=> int(2) ["c"]=> int(1) ["d"]=> int(10) }

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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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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