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<?php function foo(): iterable { return []; } function bar(): iterable|bool { return []; } echo (new ReflectionFunction('foo'))->getReturnType()->__toString(); echo ", "; echo (new ReflectionFunction('bar'))->getReturnType()->__toString();
Output for git.master_jit, git.master, rfc.property-hooks
iterable, Traversable|array|bool

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