Symfony sha512 encoder

sha512Encoding logic

<?php

/*

the below is a semplification of 
https://github.com/symfony/symfony/blob/2.8/src/Symfony/Component/Security/Core/Encoder/MessageDigestPasswordEncoder.php#L44

*/


echo "\n\n" . encodePassword('Password1', 'ghka3jtwknsck4wsgs0kwwos44oswgc') . "\n\n";

function encodePassword($raw, $salt)
{

    $salted =  $raw.'{'.$salt.'}';
    $digest = hash('sha512', $salted, true); echo 'Salted : ' . $salted . ' salt: ' . $salt . ' iterations: ' . 5000  . "\n\n"; //die;

    // "stretch" hash
    for ($i = 1; $i < 5000; ++$i) {
        $digest = hash('sha512', $digest.$salted, true);
    }

    return true ? base64_encode($digest) : bin2hex($digest);
}