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<?php function a($a = 2+2) {} $r = new ReflectionFunction('a'); $params = $r->getParameters(); var_dump($params[0]->isOptional(), $params[0]->isDefaultValueAvailable(), $params[0]->getDefaultValue());
Output for git.master, git.master_jit, rfc.property-hooks
bool(true) bool(true) int(4)

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