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@ 2014-03-11T13:33:37Z

<?php
$cid = 8162315223029015401;
$cid = number_format($cid, 0, '.', '');
echo $cid;

echo "8162315223029015401";

Output
Performance
VLD
References
Branches

number_format: documentation ( source)

preferences:dark modelive preview

40.4 ms | 402 KiB | 5 Q