<?php

class Car

{

    var $color;

    function Car($color="green") {

      $this->color = $color;

    }

    function what_color() {

      return $this->color;

    }

}

​

function print_vars($obj) {

   foreach (get_object_vars($obj) as $prop => $val) {

     echo "\t$prop = $val\n";

   }

}

​

// instantiate one object

$herbie = new Car("white");

​

// show herbie properties

echo "\herbie: Properties\n";

print_vars($herbie);

​

?>