3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $start = new DateTime('first monday of the month'); $end = new DateTime('last monday of the month'); $di = new DateInterval($start, 'P7D', $end); foreach($di as $d) { echo $d->format(DateTime::ISO8601).PHP_EOL; }
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Exception: DateTime::__construct(): Failed to parse time string (first monday of the month) at position 16 (t): The timezone could not be found in the database in /in/BhOPN:2 Stack trace: #0 /in/BhOPN(2): DateTime->__construct('first monday of...') #1 {main} thrown in /in/BhOPN on line 2
Process exited with code 255.
Output for hhvm-3.12.0
Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (first monday of the month) at position 16 (t): The timezone could not be found in the database' in /in/BhOPN:2 Stack trace: #0 /in/BhOPN(2): DateTime->__construct() #1 {main}
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.6.28
Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (first monday of the month) at position 16 (t): The timezone could not be found in the database' in /in/BhOPN:2 Stack trace: #0 /in/BhOPN(2): DateTime->__construct('first monday of...') #1 {main} thrown in /in/BhOPN on line 2
Process exited with code 255.
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 the month) at position 13 (o): The timezone could not be found in the database' in /in/BhOPN:2 Stack trace: #0 /in/BhOPN(2): DateTime->__construct('first monday of...') #1 {main} thrown in /in/BhOPN on line 2
Process exited with code 255.
Output for 5.0.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/BhOPN on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected ')', expecting '(' in /in/BhOPN on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected ')', expecting '(' in /in/BhOPN on line 8
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'('' in /in/BhOPN on line 8
Process exited with code 255.