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<?php $start = new DateTime('2010-12-02'); $start_first_day = $start->modify('first day of this month'); $end = new DateTime('2012-05-06'); $end->modify('first day of next month'); $interval = DateInterval::createFromDateString('1 month'); $period = new DatePeriod($start_first_day , $interval, $end); foreach ($period as $dt) { $month_start = $dt->format("Y-m-d"); $month_end = $dt->modify('last day of this month')->format("Y-m-d"); echo $month_start . " " . $month_end . PHP_EOL; }
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
2010-12-01 2010-12-31 2011-01-01 2011-01-31 2011-02-01 2011-02-28 2011-03-01 2011-03-31 2011-04-01 2011-04-30 2011-05-01 2011-05-31 2011-06-01 2011-06-30 2011-07-01 2011-07-31 2011-08-01 2011-08-31 2011-09-01 2011-09-30 2011-10-01 2011-10-31 2011-11-01 2011-11-30 2011-12-01 2011-12-31 2012-01-01 2012-01-31 2012-02-01 2012-02-29 2012-03-01 2012-03-31 2012-04-01 2012-04-30 2012-05-01 2012-05-31
Output for 5.2.13 - 5.2.17
Warning: DateTime::modify(): Failed to parse time string (first day of this month) at position 10 (o): The timezone could not be found in the database in /in/PXnL7 on line 3 Warning: DateTime::modify(): Failed to parse time string (first day of next month) at position 10 (o): The timezone could not be found in the database in /in/PXnL7 on line 5 Fatal error: Class 'DateInterval' not found in /in/PXnL7 on line 6
Process exited with code 255.
Output for 5.2.0 - 5.2.12
Fatal error: Class 'DateInterval' not found in /in/PXnL7 on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/PXnL7 on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_OBJECT_OPERATOR in /in/PXnL7 on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /in/PXnL7 on line 11
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/PXnL7 on line 11
Process exited with code 255.

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