<?php class ClassA { function __construct() { echo "__construct() in ClassA<br>"; } function methodA($param) { echo "methodA in ClassA<br>"; } function methodB() { echo "methodB in ClassA<br>"; } } class ClassB extends ClassA { function __construct() { parent::__construct(); echo "__construct() in ClassB<br>"; } function methodA() { echo "methodA in ClassB<br>"; } function methodB($param) { echo "