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@ 2014-10-24T11:38:48Z

<?php

for ($i = 0; $i <= 255; $i++)
{
	$x = chr($i) ^ chr(128);
	var_dump([$i, $x, $i !== $x]);
}

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
chr: documentation ( source)

preferences:dark modelive preview

46.47 ms | 402 KiB | 5 Q