<?php
header('Content-Type: application/json');

$host = 'your_db_host';
$db = 'your_db_name';
$user = 'your_db_user';
$pass = 'your_db_password';
$charset = 'utf8mb4';

$dsn = "mysql:host=$host;dbname=$db;charset=$charset";
$options = [
    PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
    PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    PDO::ATTR_EMULATE_PREPARES   => false,
];

try {
    $pdo = new PDO($dsn, $user, $pass, $options);
} catch (\PDOException $e) {
    http_response_code(500);
    echo json_encode(['error' => 'Database connection failed']);
    exit;
}

$query = $pdo->query('SELECT id, first_name, last_name FROM users');
$users = $query->fetchAll();

echo json_encode($users);