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run code in 150+ php & hhvm versions
Bugs & Features
<?php echo new DateTime('first day of this month', $tz);
Output for 7.1.0
Notice: Undefined variable: tz in /in/99TIb on line 3 Recoverable fatal error: Object of class DateTime could not be converted to string in /in/99TIb on line 3
Process exited with code 255.
Output for 5.3.6 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.0.14
Notice: Undefined variable: tz in /in/99TIb on line 3 Catchable fatal error: Object of class DateTime could not be converted to string in /in/99TIb on line 3
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.2.1 - 5.3.5
Notice: Undefined variable: tz in /in/99TIb on line 3 Fatal error: Uncaught exception 'Exception' with message 'DateTime::__construct() expects parameter 2 to be DateTimeZone, null given' in /in/99TIb:3 Stack trace: #0 /in/99TIb(3): DateTime->__construct('first day of th...', NULL) #1 {main} thrown in /in/99TIb on line 3
Process exited with code 255.
Output for 5.2.0
Notice: Undefined variable: tz in /in/99TIb on line 3 Warning: DateTime::__construct() expects parameter 2 to be DateTimeZone, null given in /in/99TIb on line 3 Catchable fatal error: Object of class DateTime could not be converted to string in /in/99TIb on line 3
Process exited with code 255.
Output for 5.0.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/99TIb on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.9
Fatal error: Cannot instantiate non-existent class: datetime in /in/99TIb on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Cannot instantiate non-existent class: datetime in /in/99TIb on line 3