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<?php $s = serialize(new class { public $foo; public function __destruct() { echo "__destruct(): Exterminate! Exterminate!\n"; } }); echo "\n"; echo $s; echo "\n\n"; #$u = unserialize($s); #var_dump($u); echo "Demo's over.\n";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Fatal error: Uncaught Exception: Serialization of 'class@anonymous' is not allowed in /in/7OOWk:3 Stack trace: #0 /in/7OOWk(3): serialize(Object(class@anonymous)) #1 {main} thrown in /in/7OOWk on line 3 __destruct(): Exterminate! Exterminate!
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Fatal error: Uncaught Exception: Serialization of 'class@anonymous' is not allowed in /in/7OOWk:3 Stack trace: #0 /in/7OOWk(3): serialize(Object(class@anonymous)) #1 {main} thrown in /in/7OOWk on line 3
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/7OOWk on line 3
Process exited with code 255.

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