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<?php // Works $date = new DateTime('2013-12-27', new DateTimeZone('GMT')); var_dump($date); var_dump($date->modify('+1 day')); // Doesn't work $date = new DateTime('2013-12-27', new DateTimeZone('GMT')); var_dump($date); var_dump($date->modify('+1 weekday'));
based on I3NDJ
Output for 5.5.14 - 7.1.0
object(DateTime)#1 (3) { ["date"]=> string(26) "2013-12-27 00:00:00.000000" ["timezone_type"]=> int(2) ["timezone"]=> string(3) "GMT" } object(DateTime)#1 (3) { ["date"]=> string(26) "2013-12-28 00:00:00.000000" ["timezone_type"]=> int(2) ["timezone"]=> string(3) "GMT" } object(DateTime)#2 (3) { ["date"]=> string(26) "2013-12-27 00:00:00.000000" ["timezone_type"]=> int(2) ["timezone"]=> string(3) "GMT" } object(DateTime)#2 (3) { ["date"]=> string(26) "2013-12-30 00:00:00.000000" ["timezone_type"]=> int(2) ["timezone"]=> string(3) "GMT" }
Output for 5.5.10 - 5.5.13
object(DateTime)#1 (3) { ["date"]=> string(19) "2013-12-27 00:00:00" ["timezone_type"]=> int(2) ["timezone"]=> string(3) "GMT" } object(DateTime)#1 (3) { ["date"]=> string(19) "2013-12-28 00:00:00" ["timezone_type"]=> int(2) ["timezone"]=> string(3) "GMT" } object(DateTime)#2 (3) { ["date"]=> string(19) "2013-12-27 00:00:00" ["timezone_type"]=> int(2) ["timezone"]=> string(3) "GMT" } object(DateTime)#2 (3) { ["date"]=> string(19) "2013-12-30 00:00:00" ["timezone_type"]=> int(2) ["timezone"]=> string(3) "GMT" }
Output for 5.3.0 - 5.4.29, 5.5.0 - 5.5.9
object(DateTime)#1 (3) { ["date"]=> string(19) "2013-12-27 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#1 (3) { ["date"]=> string(19) "2013-12-28 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#2 (3) { ["date"]=> string(19) "2013-12-27 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#2 (3) { ["date"]=> string(19) "2013-12-30 00:00:00" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" }
Output for 5.4.30 - 5.4.45
object(DateTime)#1 (3) { ["date"]=> string(26) "2013-12-27 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#1 (3) { ["date"]=> string(26) "2013-12-28 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#2 (3) { ["date"]=> string(26) "2013-12-27 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" } object(DateTime)#2 (3) { ["date"]=> string(26) "2013-12-30 00:00:00.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" }
Output for 5.2.0 - 5.2.17
object(DateTime)#1 (0) { } NULL object(DateTime)#2 (0) { } NULL
Output for 5.0.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/08ZG4 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: datetime in /in/08ZG4 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: datetime in /in/08ZG4 on line 4