Test cookie set on 302 redirect

302cookie.php

<?php
/**
 * Test for cookie setting when doing a 302 redirect,
 * has been known to cause issues in certain browser versions most notible Safari.
 * 
 * Copied from here http://blog.dubbelboer.com/2012/11/25/302-cookie.html
 */
if (isset($_GET['show'])) {
  // Delete the cookie (note: it will still be set in $_COOKIE).
  setcookie('test');

  echo 'Cookie was: ';

  if (isset($_COOKIE['test']) && ($_COOKIE['test'] == $_GET['show'])) {
    echo 'SET';
  } else {
    echo 'NOT SET';
  }

  // Make sure this is a new url. This is needed for 301 responses which are otherwise cached.
  echo '<br><a href="?a=' , microtime(true) , '">try again</a>';
} else {
  $id = microtime(true);

  setcookie('test', $id, time() + 4);
  header('Location: ?show=' . $id, true, 302); // Could also use 301.
}