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<?php $fn = function() { echo('hello world!'); }; echo(gettype($fn)); $r = new ReflectionFunction(gettype($fn));
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, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
object Fatal error: Uncaught ReflectionException: Function object() does not exist in /in/d463P:7 Stack trace: #0 /in/d463P(7): ReflectionFunction->__construct('object') #1 {main} thrown in /in/d463P on line 7
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
object Fatal error: Uncaught exception 'ReflectionException' with message 'Function object() does not exist' in /in/d463P:7 Stack trace: #0 /in/d463P(7): ReflectionFunction->__construct('object') #1 {main} thrown in /in/d463P on line 7
Process exited with code 255.

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