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<?php $datetime = new DateTime('first hour of -1 month'); echo $datetime->format('jS, F Y'); echo $datetime->getTimestamp();
Output for 8.3.0 - 8.3.4
Fatal error: Uncaught DateMalformedStringException: Failed to parse time string (first hour of -1 month) at position 11 (o): The timezone could not be found in the database in /in/hGlVl:2 Stack trace: #0 /in/hGlVl(2): DateTime->__construct('first hour of -...') #1 {main} thrown in /in/hGlVl on line 2
Process exited with code 255.
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17
Fatal error: Uncaught Exception: Failed to parse time string (first hour of -1 month) at position 11 (o): The timezone could not be found in the database in /in/hGlVl:2 Stack trace: #0 /in/hGlVl(2): DateTime->__construct('first hour of -...') #1 {main} thrown in /in/hGlVl on line 2
Process exited with code 255.
Output for 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
Fatal error: Uncaught Exception: DateTime::__construct(): Failed to parse time string (first hour of -1 month) at position 11 (o): The timezone could not be found in the database in /in/hGlVl:2 Stack trace: #0 /in/hGlVl(2): DateTime->__construct('first hour of -...') #1 {main} thrown in /in/hGlVl on line 2
Process exited with code 255.
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.21
Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct(): Failed to parse time string (first hour of -1 month) at position 11 (o): The timezone could not be found in the database' in /in/hGlVl:2 Stack trace: #0 /in/hGlVl(2): DateTime->__construct('first hour of -...') #1 {main} thrown in /in/hGlVl 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/hGlVl on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Fatal error: Cannot instantiate non-existent class: datetime in /in/hGlVl on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: datetime in /in/hGlVl on line 2

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