<?php $myArray = [ true, ['abc', 'def', false], false, 1, 'ghi', 2, [['HELLO', 'WORLD', true], [123, 456, false, 'false'], ], ]; array_walk_recursive( $myArray, function (&$value) { if (is_bool($value)) { $value = 'I AM A BOOLEAN'; } } ); var_dump($myArray);
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