Using $this when not in object context

[petergyarmati]

I installed and try using but I received an error message.
Fatal error: Using $this when not in object context in C:\xampp\htdocs\projectfolder\vendor\phpsec\phpsec\lib\phpSec\Crypt\Hash.php on line 98

content of index.php

<?php
//phpSec test
require 'vendor/autoload.php';

$hash = \phpSec\Crypt\Hash::create('password');
echo $hash;