Given a time, how can I find the time one month ago

Question

Given a time, how can I find the time one month ago.

Answer 1

PHP 5.2=<

$date = new DateTime(); // Return Datetime object for current time
$date->modify('-1 month'); // Modify to deduct a month (Also can use '+1 day', '-2 day', ..etc)
echo $date->format('Y-m-d'); // To set the format 

Ref: http://php.net/manual/en/datetime.modify.php