gistfile1.txt

<?
session_start();

if ($_GET['action'] == 'reset') {
	$_SESSION['SCORE'] = 0;
}
if ($_GET['action'] == 'up') {
	$_SESSION['SCORE'] ++;
}

if ($_GET['sell']) {
	$_SESSION['SCORE'] += 999;
}

if ($_GET) header('location:/');

echo '<title>Number game awesome time!</title>';
echo '<div style="text-align:center"><h1>Numberwang!</h1>';
echo '<hr><h1>'.(int)$_SESSION['SCORE'].'</h1>';
echo '<hr><a href="/?sell=bob" style="color:darkorange;font-weight:bold">Buy InApp Booster (10$)</a> &middot; <a href="/?action=up">Increment!</a>';
echo ' &middot; <a href="/?action=reset">Reset</a>';
echo '</div>';

?>