<?php
require_once 'utils.php';
if (!empty($_POST)) {
setcookie("tc", $_POST['cookie_value'], null, '/');
} elseif (isset($_GET["show_value"])) {
echo html_escape_value($_COOKIE["tc"]);
die();
}
?>
<!DOCTYPE html>
<html>
<body>
<form method="post">
<input name="cookie_value">
<input type="submit" value="Set cookie">
</form>
</body>