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@ 2018-06-02T16:17:01Z

<?php

$myArray = [
    true,
    ['abc', 'def', false],
    false,
    1,
    'ghi',
    2,
    [['HELLO', 'WORLD', true],
     [123, 456, false, 'false'],
    ],
];

array_walk_recursive(
    $myArray,
    function ($key,&$value) {
        if (is_bool($value)) {
            $value = 'I AM A BOOLEAN';
        }
    }
);

var_dump($myArray);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
array_walk_recursive: documentation ( source)

preferences:dark modelive preview

51.41 ms | 402 KiB | 5 Q