Health check monitor on URL, it times out when throttle time is being expired. [VANILLA PHP]

health-check-with-throttler.php

<?php
const HEALTH_CHECK_INTERVAL_IN_SECONDS = '15';
const HEALTH_CHECK_THROTTLE = '10 minutes';

if (!isset($argv[1])) {
  throw new InvalidArgumentException('Please provide one argument in JSON format');
}

$data = json_decode($argv[1]);

if (json_last_error() !== JSON_ERROR_NONE) {
    throw new InvalidArgumentException('JSON malformed');
}

if (!isset($data->name)) {
    throw new InvalidArgumentException('Missing blockchain name');
}

$url = sprintf('https://%s.app.alleochain.io', $data->name);

$endOfHealthCheckTime = new DateTimeImmutable('+' . HEALTH_CHECK_THROTTLE);
while (true) {
    $currentTime = new DateTimeImmutable();

    if ($endOfHealthCheckTime <= $currentTime) {
        throw new RuntimeException('Blockchain heath check failed on ' . $url);
    }

    $resource = curl_init();
    curl_setopt($resource, CURLOPT_URL, $url);
    # Should be a head request
    curl_setopt($resource, CURLOPT_NOBODY, true);
    # Have the response back
    curl_setopt($resource, CURLOPT_RETURNTRANSFER, true);
    # Keep HEADERS in the response
    curl_setopt($resource, CURLOPT_HEADER, true);

    curl_exec($resource);

    if (curl_getinfo($resource, CURLINFO_HTTP_CODE) === 200) {
        exit(0);
    }

    curl_close($resource);
    sleep(HEALTH_CHECK_INTERVAL_IN_SECONDS);
}