PHP Call_user_func_array How to invoke the object class method

function callback ($object) {        if ($object! = null && method_exists ($object, ' returndata ')) {            //can be executed here            Call_user_func_array (Array ($object, ' returndata '), Array (error_soft_no_exist));        }    }

I call callback ($this) in a class, Method_exists returns True, but then Call_user_func_array always error: Think\controller:returndata method does not exist!

Think\controller:returndata is the base class for this class, Returndata method in this class, how can I call this method of this class, instead of calling the method of the base class?

Reply to discussion (solution)

Resolved so that the method called must be a public method

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