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<?php $foo = new class {private $bar = '2';}; $bar = function ($foo) {return $foo . 'ly';}; var_dump(serialize($bar));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught Exception: Serialization of 'Closure' is not allowed in /in/jvn3b:5 Stack trace: #0 /in/jvn3b(5): serialize(Object(Closure)) #1 {main} thrown in /in/jvn3b on line 5
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/jvn3b on line 3
Process exited with code 255.
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185.97 ms | 402 KiB | 214 Q