In our application in Lesson 16, we wrote PHP code to implement a sample University Result application. But I have not shown you how to test our application on the browser. It is advisable to know how to test your application on the browser for a number of reasons; One, it can save you time a lot of time having to push your changes to server now and then. Two, for those learning about USSD applications, and having no intentions to go live, it is economical, because you will have to pay for the test bed. Three, test bed period may be short, which may not be enough for testing during development and for real system testing for real users.
Now, make sure your local server is running. We want to emulate a USSD gateway. Assuming that http://localhost/ussdapp/ucuresults.php is the callback URL provided to the USSD gateway, we expect that it will append some more data as query parameters. So, we assume we are the gateway and add these parameters for ourselves. We will have something like this.