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@ 2013-07-03T07:47:19Z

<?php

$bitPointer = 0;
$length = 1;

$mask = (0xff >> (8 - $length)) << (8 - $bitPointer);
printf("%08b", $mask);

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printf: documentation ( source)

preferences:dark modelive preview

36.55 ms | 402 KiB | 5 Q