<?phpClass test { // Class variable var $myvar; //Constructor function function test($a) { $this->$myvar=$a; } function get_var() { return $this->myvar; } function add_to_var($new) { $this->myvar=$this->myvar+$new; }}?>
<?php Class test2 extends test { var $second_var; function update_second_var($b) { $this->second_var=$b; }}?>