bcrypt cost calculator

bcryptcost.php

<?php
$mooreLawConst = 18;
$defaults = 6; // from initial implementation for normal user

$monthsFromPublication = (new \DateTime('1999-12-31'))->diff(new \DateTime());
$monthsFromPublication = $monthsFromPublication->y * 12 + $monthsFromPublication->m + round($monthsFromPublication->d / 31);

$cost = $defaults + $monthsFromPublication / $mooreLawConst;
var_dump($cost);

$start = microtime(true);
password_hash('somepasswordstring', \CRYPT_BLOWFISH, ['cost' => $cost]);
var_dump(microtime(true) - $start);