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@ 2017-07-07T06:46:36Z

<?php

$seq = 2839075015;
$iso = 18;

echo sprintf("%X", ($iso << 48) + $seq);
echo "\n";
echo ($iso << 48) + $seq;
echo "\n";
echo (($iso << 48) | $seq);
echo "\n";
echo dechex(($iso << 48) | $seq);
echo "\n";

Output
Performance
VLD
References
Branches

dechex: documentation ( source)
sprintf: documentation ( source)

preferences:dark modelive preview

65.43 ms | 402 KiB | 5 Q