function hash_password($password, $algorithm = 'whirlpool', $salt_length = 16)
{
 $salt = substr(hash($algorithm, uniqid(md5(rand()), true)), 0, $salt_length);
 $hash = hash($algorithm, $salt . $password);
 $pos = strlen($password) >= strlen($hash) ? strlen($hash) : strlen($password);

 return substr($hash, 0,  $pos) . $salt . substr($hash, $pos);
}

function verify_password($check_pass, $pass_hash, $algorithm = 'whirlpool', $salt_length = 16)
{
 $pos = (strlen($check_pass) >= strlen($pass_hash) - $salt_length) ? strlen($pass_hash) - $salt_length : strlen($check_pass);
 $salt = substr($pass_hash, $pos, $salt_length);
 $hash = hash($algorithm, $salt . $check_pass);

 return $pass_hash == substr($hash, 0, $pos) . $salt . substr($hash, $pos);
}