3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface FooCallback { function __invoke(string $first, int $second, stdClass $third) : bool; } function useACallback(FooCallback $c) { return $c('abc', 1234, (object)[]); } var_dump(useACallback(new class implements FooCallback { function __invoke(string $first, int $second, stdClass $third) { return $second > 12; } }));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Fatal error: Declaration of FooCallback@anonymous::__invoke(string $first, int $second, stdClass $third) must be compatible with FooCallback::__invoke(string $first, int $second, stdClass $third): bool in /in/Fvv8L on line 10
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Fatal error: Declaration of class@anonymous::__invoke(string $first, int $second, stdClass $third) must be compatible with FooCallback::__invoke(string $first, int $second, stdClass $third): bool in /in/Fvv8L on line 10
Process exited with code 255.
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
Fatal error: Declaration of class@anonymous::__invoke(string $first, int $second, stdClass $third) must be compatible with FooCallback::__invoke(string $first, int $second, stdClass $third): bool in /in/Fvv8L on line 9
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.21
Parse error: syntax error, unexpected ':', expecting ';' or '{' in /in/Fvv8L on line 3
Process exited with code 255.
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