浅析PHP 5.0对象模型深度探索之绑定(3)_PHP教程

class User //用户
{
protected function isAuthorized() //是否是验证用户
{
return(FALSE);
}

public function getName() //获得名字
{
return($this-＞name);
}

public function deleteUser($username) //删除用户
{
if(!$this-＞isAuthorized())
{
print("You are not authorized.
n");
return(FALSE);
}

//delete the user
print("User deleted.
n");
}
}

class AuthorizedUser extends User //认证用户
{
protected function isAuthorized() //覆写isAuthorized()
{
return(TRUE);
}
}

$user = new User;
$admin = new AuthorizedUser;

//not authorized
$user-＞deleteUser("Zeev");

//authorized
$admin-＞deleteUser("Zeev");
?＞