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<?
$ar1 = array('a'=>array('a','b'));
$ar2 = array('a'=>array('c','d'));
$result = array_merge_recursive($ar1, $ar2);
print_r($result);

Success #stdin #stdout 0.03s 13112KB

stdin

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Standard input is empty

stdout

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Array
(
    [a] => Array
        (
            [0] => a
            [1] => b
            [2] => c
            [3] => d
        )

)

https://ideone.com/xZQYd

language:

PHP (php 7.3.5)

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visibility:

public

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