Test PHP password_hash timing

hashTimeTest.php

<?php
$timeTarget = 0.2; 
$cost = 9;
do {
    $cost++;
    $start = microtime(true);
    password_hash("test", PASSWORD_BCRYPT, ["cost" => $cost]);
    $end = microtime(true);
} while (($end - $start) < $timeTarget);

echo "Appropriate Cost Found: " . $cost . "\n";

instructions

Run this by setting the target time you want for a password to be hashed. Then run it to find out what a good cost level is for your hardware.