//Pass your Registered Secret Key
$hashData = “Your Secret Key“;
$hash = “ebskey”.”|”.urlencode($_POST[‘account_id’]).”|”.urlencode($_POST[‘amount’]).”|”.urlencode($_POST[‘reference_no’]).”|”.$_POST[‘return_url’].”|”.urlencode($_POST[‘mode’]);
$secure_hash = md5($hash);
// now pass $secure_hash secure hash to ebs .