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<?php function f($b = ["\n", new \stdClass]) { } var_dump((string) (new ReflectionFunction("f"))->getParameters()[0]); function g($b = ["\n"]) { } var_dump((string) (new ReflectionFunction('g'))->getParameters()[0]);
Output for git.master_jit, git.master
string(55) "Parameter #0 [ <optional> $b = [' ', new \stdClass()] ]" string(39) "Parameter #0 [ <optional> $b = ['\n'] ]"

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