<?php
declare(strict_types=1);
header('Content-Type: application/json; charset=utf-8');
echo json_encode([
  'ok'=>true,
  'method'=>$_SERVER['REQUEST_METHOD'] ?? null,
  'post'=>$_POST,
  'files'=>array_map(fn($f)=>['name'=>$f['name']??null,'size'=>$f['size']??null,'type'=>$f['type']??null,'error'=>$f['error']??null], $_FILES ?? [])
]);