<?php
declare(strict_types=1);

header("Content-Type: application/json; charset=utf-8");
if (($_SERVER["REQUEST_METHOD"] ?? "GET") !== "POST") { http_response_code(405); header("Allow: POST"); echo json_encode(["error"=>"Use POST"]); exit; }
$raw = $_POST["item"] ?? null;
$item = is_string($raw) ? trim($raw) : "";
if ($item === "" || mb_strlen($item, "UTF-8") > 60) {
    http_response_code(422); echo json_encode(["errors"=>["item"=>"Use 1 to 60 characters"]]); exit;
}
echo json_encode(["item"=>$item], JSON_THROW_ON_ERROR);