3v4l.org

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<?php function encode($message, $seed) { return base64_encode($message.$seed); } function decode($data, $seed) { return substr(base64_decode($data), 0, strlen($seed)*-1); } var_dump($data = encode('hi this is a string','seed123'), decode($data, 'seed123'));

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34.89 ms | 402 KiB | 5 Q