backend-tester.php

<?php

require_once 'vendor/autoload.php';

$data = [
'MerchantCode' => "M09111",
'PaymentId' => "",
'RefNo' => "83-6732",
'Amount' => "3.04",
'Currency' => "MYR",
'ProdDesc' => "Event Registration Fee",
'UserName' => "Hui Yang Ch&#039;ng",
'UserEmail' => "chy1988@gmail.com",
'UserContact' => "016461234",
'Remark' => "",
'Lang' => "",
'Signature' => "0gb78GrvFMSPLbUg0oYlyy+YrDg=",
'ResponseURL' => "https://event.my/payment/default/complete-payment?payId=6732&amp;cancelUrl=%2Forder%2Fdefault%2Fpayment&amp;type=order&amp;payMethod=ipay88",
'BackendURL' => "https://event.my/payment/default/complete-payment?payId=6732&amp;cancelUrl=%2Forder%2Fdefault%2Fpayment&amp;type=order&amp;payMethod=ipay88&amp;backend=1",
];

?>
<form action="<?= $data['BackendURL'] ?>" method="post">
    <?php foreach($data as $key => $value): ?>
        <input type="hidden" name="<?= $key ?>" value="<?= $value ?>" />
    <?php endforeach ?>
    <button>submit</button>
</form>