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@ 2014-11-14T14:30:49Z

<?php
$value = -2.2204460492503E-16;
$round = round($value, 4);
var_dump($round);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
round: documentation ( source)

preferences:dark modelive preview

33.86 ms | 402 KiB | 5 Q