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<?php if (class_exists('DateTime')) { $date = new DateTime('2013-10-31'); $date->modify('-1 month'); printf("2013-10-31, -1 month: %s\n", $date->format('m')); $date = new DateTime('2013-10-31'); $date->modify('first day 1 month ago'); printf("2013-10-31, first day 1 month ago: %s\n", $date->format('m')); } else { print 'Not supported.'; }
Output for 5.2.0 - 7.1.0
2013-10-31, -1 month: 10 2013-10-31, first day 1 month ago: 09
Output for 4.3.0 - 5.1.6
Not supported.