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<?php $str = 'O:8:"DateTime":3:{s:4:"date";s:26:"2000-01-01 00:00:00.000000";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"AAA";}'; var_export(unserialize($str));
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Error: Invalid serialization data for DateTime object in /in/UeffZ:4 Stack trace: #0 [internal function]: DateTime->__unserialize(Array) #1 /in/UeffZ(4): unserialize('O:8:"DateTime":...') #2 {main} thrown in /in/UeffZ on line 4
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 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
Fatal error: Uncaught Error: Invalid serialization data for DateTime object in /in/UeffZ:4 Stack trace: #0 [internal function]: DateTime->__wakeup() #1 /in/UeffZ(4): unserialize('O:8:"DateTime":...') #2 {main} thrown in /in/UeffZ on line 4
Process exited with code 255.
Output for 5.4.28 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20
Fatal error: Invalid serialization data for DateTime object in /in/UeffZ on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.27

Process exited with code 139.
Output for 5.2.0 - 5.2.17
DateTime::__set_state(array( 'date' => '2000-01-01 00:00:00.000000', 'timezone_type' => 3, 'timezone' => 'AAA', ))
Output for 5.1.0 - 5.1.6
__PHP_Incomplete_Class::__set_state(array( '__PHP_Incomplete_Class_Name' => 'DateTime', 'date' => '2000-01-01 00:00:00.000000', 'timezone_type' => 3, 'timezone' => 'AAA', ))
Output for 5.0.0 - 5.0.5
class __PHP_Incomplete_Class { public $__PHP_Incomplete_Class_Name = 'DateTime'; public $date = '2000-01-01 00:00:00.000000'; public $timezone_type = 3; public $timezone = 'AAA'; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
class __PHP_Incomplete_Class { var $__PHP_Incomplete_Class_Name = 'datetime'; var $date = '2000-01-01 00:00:00.000000'; var $timezone_type = 3; var $timezone = 'AAA'; }

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267.06 ms | 402 KiB | 327 Q