Why is this not working

Question

I'm to get data with ajax and php but when I tap on the button nothing happens.

https://code.sololearn.com/WyroA9xn09om/?ref=app
https://code.sololearn.com/wNX52rFpwZh0/?ref=app
This the page :
https://naijalife.000webhostapp.com/tester.php

Answer 1

I don’t thnik there is a testing.php file, I would test it with a global file path