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<?php echo date('Y-m-d', mktime('2010', '24', '01', '12', '12', '12')); $date = new \DateTime('first day of february'); echo $date->format('Y-m-d');
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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
2013-03-052014-02-01
Output for 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/U87t4 on line 5 2013-03-05 Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (first day of february) at position 10 (o): The timezone could not be found in the database' in /in/U87t4:5 Stack trace: #0 /in/U87t4(5): DateTime->__construct('first day of fe...') #1 {main} thrown in /in/U87t4 on line 5
Process exited with code 255.
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/U87t4 on line 5 2013-03-05 Fatal error: Class 'DateTime' not found in /in/U87t4 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/U87t4 on line 5 2013-03-05 Fatal error: Cannot instantiate non-existent class: datetime in /in/U87t4 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/U87t4 on line 5 2013-03-05 Fatal error: Cannot instantiate non-existent class: datetime in /in/U87t4 on line 5

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