Implement an interface in php

Code:

<?php
interface Chargeable {
    public function getPrice();
}

class Employee implements Chargeable {
    protected $price;

    public function getPrice() {
        return $this->price;
    }
}

$product = new Employee();

?>

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M. S. Rakha, Ph.D.
Queen's University
Canada

Author: DrRakha
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