Stand 2026-04-13: PHP/MySQL Infrastruktur, Flussmanagement, Stadt-Prototyp

- PHP/MySQL Backend (XAMPP + Produktionsserver)
- Front-Controller, API-Endpunkte, Session-Management
- Flussmanagement-Simulation (Echtzeit, Punkt-basierter Fluss)
- Stadt & Raumplanung (Prototyp, Top-Down Kachelsystem)
- Klimawaechter 3D: Deiche kleiner, Baeume kippen, Budget angepasst
- persistence.ts: Dualer Speicher (localStorage + Server-API)
- 6 Unit-Test-Dateien fuer bestehende Simulationen

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

App/php/config/app.php

@@ -0,0 +1,38 @@
+<?php
+/**
+ * GeoGraSim — App Configuration
+ * Umgebungserkennung und Grundkonstanten
+ */
+
+// Umgebungserkennung via Hostname
+define('IS_PRODUCTION', isset($_SERVER['HTTP_HOST']) && $_SERVER['HTTP_HOST'] !== 'localhost');
+define('BASE_PATH', '/geograsim/App');
+define('BASE_URL', (IS_PRODUCTION ? 'https://www.staatsgeheimnis.at' : 'http://localhost') . BASE_PATH);
+define('APP_ROOT', dirname(__DIR__, 2));
+
+// .env laden
+$envFile = IS_PRODUCTION
+    ? APP_ROOT . '/.env.production'
+    : APP_ROOT . '/.env.local';
+
+if (file_exists($envFile)) {
+    $lines = file($envFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
+    foreach ($lines as $line) {
+        $line = trim($line);
+        if ($line === '' || $line[0] === '#') continue;
+        if (strpos($line, '=') === false) continue;
+        [$key, $value] = explode('=', $line, 2);
+        $key = trim($key);
+        $value = trim($value);
+        if (!defined($key)) {
+            define($key, $value);
+        }
+    }
+}
+
+// Defaults fuer lokale Entwicklung (XAMPP)
+if (!defined('DB_HOST'))  define('DB_HOST', 'localhost');
+if (!defined('DB_NAME'))  define('DB_NAME', 'geograsim');
+if (!defined('DB_USER'))  define('DB_USER', 'root');
+if (!defined('DB_PASS'))  define('DB_PASS', '');
+if (!defined('DB_PORT'))  define('DB_PORT', '3306');

App/php/config/db.php

@@ -0,0 +1,19 @@
+<?php
+/**
+ * GeoGraSim — Database Connection (PDO)
+ */
+
+require_once __DIR__ . '/app.php';
+
+function getDB(): PDO {
+    static $pdo = null;
+    if ($pdo === null) {
+        $dsn = sprintf('mysql:host=%s;port=%s;dbname=%s;charset=utf8mb4', DB_HOST, DB_PORT, DB_NAME);
+        $pdo = new PDO($dsn, DB_USER, DB_PASS, [
+            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
+            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
+            PDO::ATTR_EMULATE_PREPARES   => false,
+        ]);
+    }
+    return $pdo;
+}