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<?php $input = [0x100000000 => "5\0", 0x001 => 'hund']; $input[1] = md5($input[1]); var_dump($input); var_dump($input === ["5", '06e2b745f3124f7d670f78eabaa94809']); var_dump($input[0] + 0); var_dump([5 => 5] === [0x100000005 => 0x05]); // bool(true)

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