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factorial.php
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<?php if (version_compare(PHP_VERSION, '5.4', '<=')) { throw new \RuntimeException('PHP 5.4+ is required for this example.'); } require __DIR__ . '/../vendor/autoload.php'; use Jeremeamia\SuperClosure\SerializableClosure; $factorial = new SerializableClosure(function ($n) use (&$factorial) { return ($n <= 1) ? 1 : $n * $factorial($n - 1); }); echo $factorial(5) . PHP_EOL; //> 120 $serialized = serialize($factorial); $unserialized = unserialize($serialized); echo $unserialized(5) . PHP_EOL; //> 120
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