UrlManipulator-php/server/urlManipulator/AbstractUrlManipulator.php

<?php

namespace urlManipulator;
// this is a custom AbstractUrlManipulator class that will manipulate a URL
abstract class AbstractUrlManipulator
{
  abstract public function manipulateUrl(string $url);
  abstract protected function addParamToUrl(string $url, string $param, string $value);
  abstract protected function generateRandomValue();
  abstract protected function getNewParam(array $existingParams, string $originalUrl);
}