init.php

<?php
// The contents of this file will be evaluated just
// before the Core API loads, on every request.

if(!defined('PHP_VERSION_ID') or PHP_VERSION_ID < 80400) {
  fail("The minimum required PHP version is 8.4. Please upgrade your PHP installation to continue.");
}

// Error for mismatches between CANONICAL and FORCE_HTTPS.
if(FORCE_HTTPS and str_starts_with(CANONICAL, "http://")) {
  fail("You've set 'force_https' to true, but the 'canonical' still contains http:// (instead of https://). This can potentially cause mixed content warnings, and messes with the canonical URL of the app!");
}