<?php
/**
 * Database Connection
 */

// Prevent direct access
if (!defined('DB_HOST')) {
    die('Direct access not permitted');
}

function getDB() {
    static $pdo = null;
    if ($pdo === null) {
        try {
            $dsn = "mysql:host=" . DB_HOST . ";dbname=" . DB_NAME . ";charset=" . DB_CHARSET;
            $pdo = new PDO($dsn, DB_USER, DB_PASS, [
                PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
                PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
                PDO::ATTR_EMULATE_PREPARES => false
            ]);
        } catch (PDOException $e) {
            die("Database Connection Failed: " . $e->getMessage());
        }
    }
    return $pdo;
}
?>