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<?php declare(strict_types = 1); /** * @param array{a?:array{b:bool}} $options */ function f(array $options): bool { if (isset($options['a']['b'])) { return true; } return false; } /** * @param array{a?:array{b:bool}} $options */ function g(array $options): bool { if (isset($options['a'], $options['a']['b'])) { return true; } return false; } var_dump(f([]));
Output for git.master, git.master_jit, rfc.property-hooks
bool(false)

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