3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php if (class_exists('DateTime')) { $date = new DateTime('2013-10-31'); $date->modify('-1 month'); print "2013-10-31, -1 month: {$date->format('m')}"; $date = new DateTime('2013-10-31'); $date->modify('first day of 1 month ago'); print "2013-10-31, first day of 1 month ago: {$date->format('m')}"; } else { print 'Not supported.'; }
Output for 5.2.0 - 5.2.12, 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
2013-10-31, -1 month: 102013-10-31, first day of 1 month ago: 09
Output for 5.2.13 - 5.2.17
2013-10-31, -1 month: 10 Warning: DateTime::modify(): Failed to parse time string (first day of 1 month ago) at position 10 (o): The timezone could not be found in the database in /in/YVZGG on line 8 2013-10-31, first day of 1 month ago: 10
Output for 5.0.0 - 5.1.6
Not supported.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '(', expecting '}' in /in/YVZGG on line 6
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/YVZGG on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `'}'' in /in/YVZGG on line 6
Process exited with code 255.