<?php

function checkGTPayTransaction($gtpay_merchant_id, $amount,$trans_id, $hash) {
    $gtpayServiceRequest = file_get_contents(sprintf("http://gtweb2.gtbank.com/GTPayService/gettransactionstatus.json?mertid=%s&amount=%s&tranxid=%s&hash=%s",
                  $gtpay_merchant_id, $amount,$trans_id,$hash
                  ));

    if($gtpayServiceRequest) {
        return json_decode($gtpayServiceRequest);
    }

    return null;
}