টাইম ফর অবজেক্ট অরিয়েন্টেড

<?php
class DepartmentInfo{
 public $departmentName;
 public $chairman;
 public $classRoom;
 public $numberOfStudents;
 
 public function __construct($dept, $chair, $room, $stdNumber) {
   $this->departmentName = $dept;
   $this->chairman = $chair;
   $this->classRoom = $room;
   $this->numberOfStudents = $stdNumber;
 }
 
 
 }
class StatisticsDept extends DepartmentInfo {
  public $labsNumber;
}

$statistics = new StatisticsDept("Statistics", "Dr. Rowshan Jahan", 6, 300);
echo "Chairman - " . $statistics->chairman . " * Students - " . $statistics->numberOfStudents;