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@ 2014-10-10T13:04:58Z

<?php


function arrayMergeRecursiveDistinct(array $first, array $second)
    {
        foreach ($second as $idx => $value) {
            if (is_integer($idx)) {
                $first[] = $value;
            } else {
                if (!array_key_exists($idx, $first)) {
                    $first[$idx] = $value;
                } else {
                    if (is_array($value)) {
                        $first[$idx] = arrayMergeRecursiveDistinct($first[$idx], $value);
                    } else {
                        $first[$idx] = $value;
                    }
                }
            }
        }

        return $first;
    }

$a = ['a' => [1,2,3], 'b' => ['c' => ['d' => 'e']]];
$b = ['a' => [1,2,3,4], 'b'];
print_r(arrayMergeRecursiveDistinct($b, $a));
print_r(array_replace_recursive($b, $a));

Output for git.master, git.master_jit, rfc.property-hooks: Array ( [a] => Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 1 [5] => 2 [6] => 3 ) [0] => b [b] => Array ( [c] => Array ( [d] => e ) ) ) Array ( [a] => Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 ) [0] => b [b] => Array ( [c] => Array ( [d] => e ) ) )

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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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