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PHP Inheritance

Am I a fruit or a berry? The fruit is Strawberry and the color is red.

<?php
// define the class Fruit
class Fruit {
  public $name;
  public $color;
  public function __construct($name, $color) {
    $this->name = $name;
    $this->color = $color; 
  }
  public function intro() {
    echo "The fruit is {$this->name} and the color is {$this->color}."; 
  }
}

// Strawberry is inherited from Fruit
class Strawberry extends Fruit {
  public function message() {
    echo "Am I a fruit or a berry? "; 
  }
}

// display Strawberry details
$strawberry = new Strawberry("Strawberry", "red");
$strawberry->message();
$strawberry->intro();
?>