How is this wrong?

Question

Forget imports and include. Those third party files are all correct. The problem is that my code in index.php from line 17 and beyond. No matter what the outcome, only the else works. Why is this happening?
https://code.sololearn.com/WOJHzCh2h82O/?ref=app
https://code.sololearn.com/WJVDOL0ct0po/?ref=app

Answer 1

Well, I'm not too sure here, but how about printing <resultado> on screen (in console, or alert() it) and see whether it contains something you expected ...

Answer 2

How do I do that?

Answer 3

Add either

console.log(resultado);

Or

alert(resultado);

Just before you check it in the following line in <script>

if(resultado == 0)