class User {
    public $name;
    public $email;

    public function __construct($name, $email) {
        $this->name = $name;
        $this->email = $email;
    }

    public function sayHi() {
        echo "hi! my name is ".$this->name;
    }
}

$tom = new User("tom", "dummy@dummy.com");
$bob = new User("bob", "dummy@dummybob.com");

echo $tom->name;
echo $tom->sayHi();
echo $bob->sayHi();