<?php
 
abstract class ParentClass {
	private $parentName;
	private $add;
 
	public function __construct($name) {
		$this->parentName = $name;
	}
 
 
	public function getParentName() {
		print($this->parentName.$this->add);
	}
 
}
 
class ChildClass extends ParentClass {
	private $add = '.';
}
 
 
 
$b = new ChildClass('joj');
 
var_dump($b);
 
 
echo $b->getParentName();