There are 2 parts to the task.

1. To write a micro service using PHP (vanilla PHP, CI or Lumen only).
2. To write a simple mobile responsive web client to consume the micro service.

The micro service will have 1 REST endpoint, /process. It will take a json value and process it. It will return the result in json as well. The json will contain the following info: referralcode.

What the "process" endpoint do is to find the owner of the referralcode and return the detail of the owner. In real application, this owner detail will be stored in a db table. However, for this challenge, please create a model with a pre-populated value. Please put a code in comment on how to do that in sql as well.

You will create a MOBILE RESPONSIVE web form for user to key in a referral code. This input is required and the referral code should be 6 characters, only contain alphanumeric, all in upper case.

There will be a submit button that is automatically enable/disable based on whether the mandatory fields are populated and valid.

When user submit the form, display a wait icon, submit using ajax to the microservice, and then display the result.

• Create a branch from this repository.
• Do all your work, make sure they run correctly in your own environment.
• Push your final work and create a pull request.
• If possible please provide us a link so that we can test your work.
• Otherwise, let us know how to setup your work so that we test it in our own workspace.

• Logic, thought process and the ability to pick up new things to complete a job.
• Completeness. We want to see that you are able to get to the final result at the same time covering all the possible edge cases and error checking.
• Simplicity. We want simple codes so maintenance is not a nightmare. This application description maybe long, but the code is simple. There are many libraries out there to help you do the job. Use them.

You can safely skip this part.

If mobile responsiveness, data binding, or ajax are new to you, below are some suggested library you can look into to help you:

• Twitter bootstrap (https://getbootstrap.com/) - for mobile responsive
• Vue (https://vuejs.org/) - for data binding, error checking and ajax
• Jquery (https://jquery.com/) - for data binding, error checking and ajax