<?php
    $host = getenv('POSTGRES_HOST');
    $db = getenv('POSTGRES_DB');
    $user = getenv('POSTGRES_APPUSER');
    $pass = getenv('POSTGRES_APPPASSWORD');
    $port = getenv('POSTGRES_PORT');

    try {
        $dsn = "pgsql:host=$host;port=$port;dbname=$db;";
        $pdo = new PDO($dsn, $user, $pass, [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]);
    } catch (PDOException $e) {
        echo "Verbindungsfehler: " . $e->getMessage();
    }
?>