3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start = new DateTime('first monday of this month'); $end = new DateTime('last monday of this month'); $end->modify('+1 day'); $dp = new DatePeriod($start, new DateInterval('P7D'), $end); foreach($dp as $d) { echo $d->format(DateTime::ISO8601).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 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.12, 8.0.14 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
2014-10-06T00:00:00+0200 2014-10-13T00:00:00+0200 2014-10-20T00:00:00+0200 2014-10-27T00:00:00+0100
Output for 7.3.32 - 7.3.33, 8.0.13
2014-10-06T00:00:00+0000 2014-10-13T00:00:00+0000 2014-10-20T00:00:00+0000 2014-10-27T00:00:00+0000
Output for 5.2.0 - 5.2.17
Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (first monday of this month) at position 13 (o): The timezone could not be found in the database' in /in/ta9Z8:2 Stack trace: #0 /in/ta9Z8(2): DateTime->__construct('first monday of...') #1 {main} thrown in /in/ta9Z8 on line 2
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/ta9Z8 on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected ')', expecting '(' in /in/ta9Z8 on line 10
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 ')', expecting '(' in /in/ta9Z8 on line 10
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'('' in /in/ta9Z8 on line 10
Process exited with code 255.
preferences:
280.57 ms | 401 KiB | 459 Q