Check URL for keywords

I’m looking at improving my PHP knowledge and wondering if anybody has any tips on improving and optimising my function below?

<?php
        function urlCheck($string = '')
        {
            $searches = array('one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine', 'ten', 'eleven', 'twelve', 'thirteen');
            $serverUrl = $_SERVER('REQUEST_URI');
            $getContents = file_get_contents('php://input');
            $queryJoin = $serverUrl . $getContents;
            foreach ($searches as $search) {
                if (strpos(strtolower(urldecode($queryJoin)), strtolower($search)) !== false) {
                    return true;
                }
            }
            return false;
        }
        
        print_r(urlCheck());