function startPaymentProcess()
{
if (!$this->TxnId) {
$this->TxnId = uniqid("ID");
}
$request = new PxPayRequest();
#Set PxPay properties
if ($this->MerchantReference) {
$request->setMerchantReference($this->MerchantReference);
} else {
user_error("error in DpsPxPayComs::startPaymentProcess, MerchantReference not set. ", E_USER_WARNING);
}
if ($this->AmountInput) {
$request->setAmountInput($this->AmountInput);
} else {
user_error("error in DpsPxPayComs::startPaymentProcess, AmountInput not set. ", E_USER_WARNING);
}
if ($this->TxnData1) {
$request->setTxnData1($this->TxnData1);
}
if ($this->TxnData2) {
$request->setTxnData2($this->TxnData2);
}
if ($this->TxnData3) {
$request->setTxnData3($this->TxnData3);
}
if ($this->TxnType) {
$request->setTxnType($this->TxnType);
} else {
user_error("error in DpsPxPayComs::startPaymentProcess, TxnType not set. ", E_USER_WARNING);
}
if ($this->CurrencyInput) {
$request->setCurrencyInput($this->CurrencyInput);
} else {
user_error("error in DpsPxPayComs::startPaymentProcess, CurrencyInput not set. ", E_USER_WARNING);
}
if ($this->EmailAddress) {
$request->setEmailAddress($this->EmailAddress);
}
if ($this->UrlFail) {
$request->setUrlFail($this->UrlFail);
} else {
user_error("error in DpsPxPayComs::startPaymentProcess, UrlFail not set. ", E_USER_WARNING);
}
if ($this->UrlSuccess) {
$request->setUrlSuccess($this->UrlSuccess);
} else {
user_error("error in DpsPxPayComs::startPaymentProcess, UrlSuccess not set. ", E_USER_WARNING);
}
if ($this->TxnId) {
$request->setTxnId($this->TxnId);
}
if ($this->EnableAddBillCard) {
$request->setEnableAddBillCard($this->EnableAddBillCard);
}
if ($this->BillingId) {
$request->setBillingId($this->BillingId);
}
/* TODO:
$request->setEnableAddBillCard($EnableAddBillCard);
$request->setBillingId($BillingId);
$request->setOpt($Opt);
*/
#Call makeRequest function to obtain input XML
$request_string = $this->PxPayObject->makeRequest($request);
#Obtain output XML
$this->response = new MifMessage($request_string);
#Parse output XML
$url = $this->response->get_element_text("URI");
//$valid = $this->response->get_attribute("valid");
#Redirect to payment page
return $url;
}