Source Code: (back to article)

<?php

class User
{
    public $username;
    public $email;

public function __construct($username, $email)
    {
        $this->username = $username;
        $this->email = $email;
    }
    public function getUsername()
    {
        return $this->username;
    }
    public function getEmail()
    {
        return $this->email;
    }

public function showInfo()
    {
        echo "Username: " . $this->username . "\n";
        echo "Email: " . $this->email . "\n";
    }
}

class Admin extends User
{
    public $permissions;
    public function __construct($username, $email, $permissions)
    {
        parent::__construct($username, $email);
        $this->permissions = $permissions;
    }
    public function getPermissions()
    {
        return $this->permissions;
    }

public function showInfo()
    {
        parent::showInfo();
        echo "Permissions: " . $this->permissions . "\n";
    }
}

$user = new User("John Doe", "john.doe@example.com");
$admin = new Admin("Jane Doe", "jane.doe@example.com", ["read", "write", "delete"]);

$users = [$user, $admin];

foreach ($users as $user) {
    $user->showInfo();
}

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