Is it possible to pass parameters by reference using call_user_func_array()?

To pass by reference using call_user_func_array() the parameter in the array must be a reference - it does not depend on the function definition whether or not it is passed by reference. For example, this would work.

I've noticed that this variation on the answer provided by Steven also works. Notice how the ampersand has been removed from $changingVar, and placed on &$parameters. Is this safe and equivalent to Steven's approach?

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