fetch_questions.php

<?php
require_once 'assets/config/config.php';
require_once "vendor/autoload.php";

use PhotoTech\ErrorHandler;
use PhotoTech\Database;
use PhotoTech\TriviaDatabaseOBJ as Trivia;

$errorHandler = new ErrorHandler();

// Register the exception handler method
set_exception_handler([$errorHandler, 'handleException']);

$database = new Database();
$pdo = $database->createPDO();

$trivia = new Trivia($pdo);
$category = htmlspecialchars($_GET['category']);

$data = $trivia->fetchQuestions($category);

// Save data to JSON file
file_put_contents('output.json', json_encode($data));

output($data);

/*
 * After converting data array to JSON send back to javascript using
 * this function.
 */

function output($output): void
{
    http_response_code(200);
    try {
        echo json_encode($output, JSON_THROW_ON_ERROR);
    } catch (JsonException) {
    }
}