Convert whole object to array without using (array) object

Question

I’m trying to convert an object PHP in array using the function:

( array ) $objeto;

Convert converts, but the exit print_r () handover:

"\u0000CelulasReunioes\u0000idCelula":"17",

Is there any other function of PHP do this conversion without adding the name of class to indexes?

Or does it really converting the object in array attribute for attribute?