如何以M / Y格式获得6个月后的日期？

How to get after 6 month date in M / Y format? i try like this one but not working..

   $regDate = "Jan / 2013";
   $validTill = date('M / Y',strtotime("+6 months", strtotime($regDate)));

Best way is use DateTime object to convert your date.

$regDate = "Jan / 2013";
$myDateTime = DateTime::createFromFormat('M / Y', $regDate);
$myDateTime->modify('+6 Months');
echo $myDateTime->format('M / Y');

CodePad DEMO.

Note: It will support for PHP 5 >= 5.3.0 only.

Convert the format to be readeable by strtotime.

$regDate = 'Jan / 2013';
// this should look likes this: 2013-01-01

Than your code will works.

And i Think better to store the dates in YYYY-MM-DD format (or as unix timestamp, but in this case you should use correct time-zone) , and when you show, convert it to the format what you need to display.