get date of next 4 days
<p>The following code worked before, but failed to get the next 4 days of today 2011-11-04</p>

<pre><code>$draw_date = '2011-11-04';
$ts = strtotime($draw_date) + 86400*4;

$ddate = date('Y-m-d', $ts);
echo $ddate;
</code></pre>

<p>The code above print 2011-11-07, but what I expected is 2011-11-08. It works if I set draw_date = '2011-10-04' or '2011-12-04'. Very weird! Can anyone explain why?</p>

<p>Thanks in advance.</p>
