<?php
// Create a curl handle
$ch = curl_init('http://example.com/redirect.php');

// Send HTTP request and follow redirections
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_exec($ch);

// Get the last effective URL
$effective_url = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
// ie. "http://example.com/show_location.php?loc=M%C3%BCnchen"

// Decode the URL
$effective_url_decoded = curl_unescape($ch, $effective_url);
// "http://example.com/show_location.php?loc=München"
?>