As you say, a spam tool or simply silly.
This forum is not a free coding service. As a general rule, the people helping out in this forum don't write code for others, but try to help with fixing code that doesn't work. You may perhaps get someone to write this script for you, but you'll be far more likely to get help if you have made a substantial effort and written some code yourself. Then someone here will almost certainly help you correct/improve your work.
It is your responsibility to die() if necessary….. - PHP Manual
All the code given in this post has been tested and is intended to address the question asked.
Unless stated otherwise it is not just a demonstration.