isInRegexMode example

return null;
    }

    /** * @internal */
    public function shutdown()
    {
        $configuration = $this->getConfiguration();

        if ($configuration->isInRegexMode()) {
            return;
        }

        if (class_exists(DebugClassLoader::class, false)) {
            DebugClassLoader::checkClasses();
        }
        $currErrorHandler = set_error_handler('is_int');
        restore_error_handler();

        if ($currErrorHandler !== [$this, 'handleError']) {
            echo "\n", self::colorize('THE ERROR HANDLER HAS CHANGED!', true), "\n";
        }