<?php

$pass = '123456';
$sha256 = hash('sha256', $pass);
$sha256 = '80'.$sha256; //prelast
$sha256two = hash('sha256', hex2bin($sha256));
$sha256two = hash('sha256', hex2bin($sha256two));
$addlast = substr($sha256two, 0, 8);
$sha256 = $sha256.strtoupper($addlast);
 
echo $sha256;