<?php
class circle
{
     private $radius, $area, $perime;
     public function setRadius($r)
     {
           $this -> radius = $r;
     }
     public function getRadius()
     {
         return $this -> radius;
     }
     public function circle_area()
     {
         $area =  $this -> radius * $this -> radius * 3.14;
         return $area;
      }
      function circle_perime()
      {
          $perime =  $this -> radius * 2 * 3.14;
          return $perime;
      }
} 
   