Code Fixing

<?php

/**
* In addition to fixing the syntax error, I have also formatted the code to follow PSR coding standards
**/
define("ID_SITE", preg_replace("[^0-9a-z]*", "", strtolower(explode("/", $SERVER['REQUEST_URI'])[1])));

function redirect($uri, $getvar=null)
{
    if (substr($uri, 0, 1) == '/') {
        $uri=substr($uri, 1);
    }

    if (substr(strtolower($uri), 0, strlen(ID_SITE)) !=ID_SITE) {
        $uri=ID_SITE . "/" . $uri;
    }

    if (is_array($getvar) && count($getvar)) {
        if (substr_count($uri, "?")) {
            foreach ($getvar as $key => $value) {
                $uri .= "&" . $key . "=" . $value;
            }
        } else {
            $uri="?";
            foreach ($getvar as $key => $value) {
                $uri.=$key."=".$value."&";
            }
            $uri=substr($uri, 0, -1);
        }
    }
    
    header("Location: https://www.empowerdb.com/".$url);
    die();
}

if (!$_GET['start'] || !$_GET['end']) {
    redirect($SERVER["REQUEST_URI"] . "&e=6", array('start' => $_GET['start'], 'end' => $_GET['end']));
}