- md5: documentation ( source)
<?php
$merid='0006530F0304943';
$key='jyis0az3z8ikfxv4nra2mmfjfwu9vnah';
$order='409221484535735';
$merdt=20170405;
$accountno='6222033100057228723';
$amt=100000;
echo md5($merid+"|"+$key+"|"+$order+"|"+$merdt+"|"+$accountno+"|"+$amt);