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@ 2015-03-19T10:14:30Z

<?php

$a = 10000;
$b = 11111;

$c = $a & $b;
$r = $a ^ $b;

var_dump(decbin($a), decbin($b), decbin($c), decbin($r), '---');

while ($c) {
    $shift = $c << 1;
    $c = $r & $shift;
    $r ^= $shift;
    var_dump(decbin($shift), decbin($c), decbin($r), '---');
}

var_dump($r);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
decbin: documentation ( source)

preferences:dark modelive preview

43.58 ms | 402 KiB | 5 Q