codeigniter custom library undefine property error - php

Question

I created a codeigniter custom library(My_payment_gate_way_init) for my payment gateway.. but when i use my custom library function , controller(Billing) not passing parameters into the library it shows
A PHP Error was encountered
Severity: Notice
Message: Undefined property: Billing::$My_payment_gate_way_init
Filename: controllers/Billing.php
Line Number: 576
that error occurs when i use
Controller
public function __construct()
{
parent::__construct();
$this->load->library('My_payment_gate_way_init');
}
function saveord(){
$ammount = $this->totlCost * 100;
$this->My_payment_gate_way_init->setTransactionAmountforPay($ammount);
}
library
class My_payment_gate_way_init
{
private $clientConfig;
private $initRequest;
private $transactionAmount;
private $redirect;
private $initResponse;
private $client;
private $CI;
function __construct()
{
$this->setTransactionAmountforPay();
}
function setTransactionAmountforPay($ammount=200){
// sets transaction-amounts details (all amounts are in cents)
$this->transactionAmount = new TransactionAmount();
$this->transactionAmount->setTotalAmount(0);
$this->transactionAmount->setServiceFeeAmount(0);
$this->transactionAmount->setPaymentAmount($ammount);
$this->transactionAmount->setCurrency("LKR");
$this->initRequest->setTransactionAmount($this->transactionAmount);
}
also it shows this error at bottom
Fatal error: Call to a member function setTransactionAmountforPay() on
null in
C:\xampp\htdocs\debug_online\application\controllers\Billing.php on
line 576

Answer 1

Make an object first before calling the function.
$this->My_payment_gate_way_init = new My_payment_gate_way_init();
$this->My_payment_gate_way_init->setTransactionAmountforPay($ammount);