<?php

/* server validation scaptcha */

session_start();

header("Content-Type: application/json");
$input = $_POST['captcha'] ?? "";

if (!isset($_SESSION["simple-captcha"])) {
  echo json_encode(["status" => "error"]);
  exit;
}

if (strcasecmp($input, $_SESSION["simple-captcha"]) === 0) {
  unset($_SESSION["simple-captcha"]);
  echo json_encode(["status" => "valid"]);
} else {
  echo json_encode(["status" => "invalid"]);
}

?>