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<?php function decorate(callable $func): callable { return function (mixed ...$args) use ($func): mixed { echo "Do something before the func call.", PHP_EOL; $result = $func(...$args); echo "Do something after the func call.", PHP_EOL; return $result; }; } // ------------------------------------------------------- $func = function (int $x): void { echo $x, PHP_EOL; }; $func = decorate($func); $func(x: 23);
Output for 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Do something before the func call. 23 Do something after the func call.
Output for 7.4.33
Parse error: syntax error, unexpected ':', expecting ')' in /in/bbNql on line 22
Process exited with code 255.
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