3v4l.org

run code in 500+ PHP versions simultaneously
<?php $str = '1001 1100 0100 1101'; $encoded = implode(array_map(function($ch) { return $ch === ' ' ? ' ' : random_int(0, 1);}, str_split($str))); echo $encoded;

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86.42 ms | 768 KiB | 5 Q