<?php
header('Content-Type: application/json; charset=utf-8');
$url = 'http://127.0.0.1:9000/api/public/captcha/altcha';
$context = stream_context_create([
    'http' => [
        'method' => 'GET',
        'timeout' => 6,
        'ignore_errors' => true,
        'header' => "User-Agent: MVLog-contact/1.0\r\n",
    ],
]);
$response = @file_get_contents($url, false, $context);
$status = 0;
if (isset($http_response_header[0]) && preg_match('/\s(\d{3})\s/', $http_response_header[0], $m)) {
    $status = (int)$m[1];
}
if ($response === false || $status !== 200) {
    http_response_code(502);
    echo json_encode(['error' => 'Captcha challenge unavailable']);
    exit;
}
echo $response;