<?php
header('Content-Type: application/json; charset=utf-8');

function db() {
  static $pdo = null;
  if ($pdo) return $pdo;

    $dbName = "vpr"; //Datenbankname
    $linkName = "localhost"; //Datenbank-Server
    $user = "root"; //Benutzername
    $pw = ""; //Passwort

    $pdo = new \PDO("mysql:dbname=$dbName;host=$linkName"
    , $user
    , $pw
    , array(\PDO::ATTR_ERRMODE => \PDO::ERRMODE_EXCEPTION));
return $pdo;
}

function body() {
  $raw = file_get_contents('php://input');
  $b = json_decode($raw, true);
  return is_array($b) ? $b : [];
}

const JSON_FLAGS = JSON_UNESCAPED_UNICODE | JSON_INVALID_UTF8_SUBSTITUTE;

function bad($m, $code = 400) {
  http_response_code($code);
  echo json_encode(['ok' => false, 'error' => $m], JSON_FLAGS);
  exit;
}

function ok($arr = []) {
  echo json_encode(['ok' => true] + $arr, JSON_FLAGS);
  exit;
}