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<?php function gen($a) { $closure = function () use ($a) { return $a; }; $a++; return $closure; } $closure = gen(42); echo $closure, "\n";
Output for 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
Fatal error: Uncaught Error: Object of class Closure could not be converted to string in /in/pqK6i:9 Stack trace: #0 {main} thrown in /in/pqK6i on line 9
Process exited with code 255.
Output for 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33
Recoverable fatal error: Object of class Closure could not be converted to string in /in/pqK6i on line 9
Process exited with code 255.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20
Catchable fatal error: Object of class Closure could not be converted to string in /in/pqK6i on line 9
Process exited with code 255.

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