Type hinting with Interfaces PHP - Example 3

Type hinting with Interfaces PHP 3.php

<?php
// output : 
// 10
// 100.234 

interface printable {
          public function printme();
     }

     abstract class Number {
          private $value;
          abstract public function value();
          public function reset() {
               $this->value = NULL;
          }
     }

     class Integer extends Number implements printable {
          private $value;
          function __construct($value) {
               $this->value = $value;
          }
          function value() {
            return $this->value; 
          }
          public function getValue() {
               return (int)$this->value;
          }
          public function printme() {
               echo (int)$this->value;
          }
     }


     class Floats extends Number implements printable {
          private $value;
          function __construct($value) {
               $this->value = $value;
          }
          function value() {
            return $this->value; 
          }
          public function getValue() {
               return (float)$this->value;
          }
          public function printme() {
               echo (float)$this->value;
          }
     }

     function printNumber(printable $myObject) {
          $myObject->printme();
     }
     $inst = new Integer(10);
     printNumber($inst);
     echo PHP_EOL ; 
     $inst = new Floats(100.234);
     printNumber($inst);
     
     
?>