Verificando-se nossas hashes armazemadas precisam ser atualizadas

using_password_needs_rehash.php

<?php

$password = 'myPassword';
$hash = '$2y$11$60E.YbPVdujZB5pt71C51.FTKINFQnkdyPFttgeRtLdUbOlZTD0.S';

$options = array('cost' => 12);

if (password_verify($password, $hash)) {

    if (password_needs_rehash($hash, PASSWORD_DEFAULT, $options)) {
        $newHash = password_hash($password, PASSWORD_DEFAULT, $options);
    }

}