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<?php class C { static function foo($x = null) {} } $reflMethod = new ReflectionMethod('C', 'foo'); $reflParam = $reflMethod->getParameters()[0]; $serReflParam = serialize($reflParam); $unserReflParam = unserialize($serReflParam); $unserReflParam->isOptional();

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53.04 ms | 402 KiB | 5 Q