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run code in 150+ php & hhvm versions
Bugs & Features
<?php $closure = function() {}; $serialized = serialize($closure); var_dump($serialized); $unserialized = unserialize($serialized); var_dump($unserialized);
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Exception: Serialization of 'Closure' is not allowed in /in/joNYN:5 Stack trace: #0 /in/joNYN(5): serialize(Object(Closure)) #1 {main} thrown in /in/joNYN on line 5
Process exited with code 255.
Output for hhvm-3.12.0
Warning: Attempted to serialize unserializable builtin class Closure$;1244433794$d9f53affdf18198bcd7a6a3dbbbff30$ in /in/joNYN on line 5 string(2) "N;" NULL
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.3.0 - 5.6.28
Fatal error: Uncaught exception 'Exception' with message 'Serialization of 'Closure' is not allowed' in /in/joNYN:5 Stack trace: #0 /in/joNYN(5): serialize(Object(Closure)) #1 {main} thrown in /in/joNYN on line 5
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/joNYN on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_FUNCTION in /in/joNYN on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/joNYN on line 3
Process exited with code 255.