if( $_GET['time']
AND $_SESSION['time']
AND $_SESSION['bffr']
AND $_GET['time']==$_SESSION['time']
) {
echo $_SESSION['bffr'];
exit();
}
ob_start();
?>
<a href='<?php echo '&time='.time(); ?>'>A</a>
<?php
$_SESSION['bffr'] = ob_get_contents();
ob_clean();
$_SESSION['time'] = $_GET['time'];
echo $_SESSION['bffr'];
?>
