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run code in 150+ php & hhvm versions
Bugs & Features
<?php class Bar { public $derp = 'fucking dumb'; } class Foo { public function __sleep() { $name = 'this'; $$name = new Bar; return array('derp'); } } $d = new Foo; print_r(unserialize(serialize($d)));
Output for 7.1.0
Fatal error: Uncaught Error: Cannot re-assign $this in /in/RuNbG:10 Stack trace: #0 [internal function]: Foo->__sleep() #1 /in/RuNbG(19): serialize(Object(Foo)) #2 {main} thrown in /in/RuNbG on line 10
Process exited with code 255.
Output for 5.0.2 - 5.0.4, 5.1.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.0.14
Notice: serialize(): "derp" returned as member variable from __sleep() but does not exist in /in/RuNbG on line 19 Foo Object ( [derp] => )
Output for 5.0.5

Process exited with code 139.
Output for 5.0.0 - 5.0.1
Foo Object ( [derp] => )
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/RuNbG on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/RuNbG on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/RuNbG on line 3
Process exited with code 255.