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<?php global $foo; class Foo extends DateTime { function __wakeup() { global $foo; $foo = $this; parent::__wakeup(); } } $s2 = 'O:3:"Foo":3:{s:4:"date";s:20:"20007-06-07 03:51:49";s:13:"timezone_type";i:3;s:8:"timezone";s:3:"UTC";}'; try { unserialize( $s2 ); } catch ( Exception $e ) {} var_dump( $foo );
Output for 7.1.0
Fatal error: Uncaught Error: Invalid serialization data for DateTime object in /in/ND93C:10 Stack trace: #0 /in/ND93C(10): DateTime->__wakeup() #1 [internal function]: Foo->__wakeup() #2 /in/ND93C(17): unserialize('O:3:"Foo":3:{s:...') #3 {main} thrown in /in/ND93C on line 10
Process exited with code 255.
Output for 5.3.24 - 5.3.29, 5.4.14 - 5.6.28, 7.0.0 - 7.0.14
Fatal error: Invalid serialization data for DateTime object in /in/ND93C on line 10
Process exited with code 255.
Output for hhvm-3.10.0 - 3.12.0
object(Foo)#1 (3) { ["date"]=> string(26) "2012-09-16 03:18:04.000000" ["timezone_type"]=> int(3) ["timezone"]=> string(3) "UTC" }
Output for 5.3.0 - 5.3.23, 5.4.0 - 5.4.13

Process exited with code 139.
Output for 5.2.0 - 5.2.17
Fatal error: Call to undefined method DateTime::__wakeup() in /in/ND93C on line 10
Process exited with code 255.
Output for 5.0.0 - 5.1.6
Fatal error: Class 'DateTime' not found in /in/ND93C on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected '{' in /in/ND93C on line 16
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected '{' in /in/ND93C on line 16
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/ND93C on line 16
Process exited with code 255.