<?
$url = "https://example.com:2083/login?user=USER&pass=PASS";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url); //set url
    curl_setopt($ch, CURLOPT_HEADER, true); //get header
    curl_setopt($ch, CURLOPT_NOBODY, true); //do not include response body
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); //do not show in browser the response
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); //follow any redirects
    curl_exec($ch);
    $new_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL); //extract the url from the header response

$response = curl_exec($ch);
curl_close($ch);
echo $new_url

 ?>