Discussion – Lesson 10 - Static class members in PHP pt. 2 - constants

parent::__con­struct($firstNa­me, $lastName, $age, password);

why is the "password" have no $ sign? please enlighten me thank you very much

and why if (Human::valid­Password($pas­sword))

i look the variable for $password and it is private,,, i though variable static will do it the 'self:: thank you for answer
'

I can't find any occurrence of , password) in this lesson, maybe you just forgot to write $?

In if (Human::validPassword($password)), $password is just a local variable which happens to have the same name as the $password property in the class. But these are 2 different variables, you would have to write $human->password to access the property. And as you correctly stated, it wouldn't work since it's private.

// Contents of the PhpProgrammer.php file
class PhpProgrammer extends Human
{

public $ide;

public function __construct($fir­stName, $lastName, $age, $password, $ide)
{
$this->ide = $ide;
parent::__con­struct($firstNa­me, $lastName, $age, password); // here from the phpProgrammer
}

I've downloaded the attachment from this article and I can see the $ there. Can you please recheck it?

Since PHP 8.1 there is support for enum which is imho a great improvment.
See https://php.watch/…ns/8.1/enums