What is wrong with this ajax call ?

Question

Why is this ajax call not working

https://code.sololearn.com/WyroA9xn09om/?ref=app

Answer 1

This is a play between two asking and responsing files, where last of them is on a server. I think the best help for you will be to complete your tutorials and maybe learn more and analize a standard solution and try it get to work with your equipment. For more please see:

https://www.w3schools.com/php/php_ajax_php.asp

Answer 2

What did you not understand?

Answer 3

Where you have server? Your code has no link to your server, only this "testing.php", what is not enough.

Answer 4

Thanks, but I don't understand

Answer 5

The cause of the problem