<?php class BaseClass { private $private_base = "Base"; function printVars() { var_dump($this->private_base); var_dump($this->private_child); } } class ChildClass extends BaseClass { private $private_child = "Child"; } echo "===BASE===\n"; $obj = new BaseClass(); $obj->printVars(); echo "===CHILD===\n"; $obj = new ChildClass(); $obj->printVars(); ?> ===DONE===