I have quite a weird question. I'm currently new to OOP in PHP, so please do not blame me for this question.
I have created a file and a class, called: Animals.
class Animals {
protected $_snake;
}
I have also created another file with another class, called: Nature. I would wanted to use the variable defined in the Animals class so I did extend this class. (Is it the right method to use another class's variables?)
<?php
include 'Animals.php';
class Nature extends Animals {
public function __construct () {
echo $this -> _snake;
}
}
?>
I have used the underscore to mark, that it is a protected variable (is it correct?). The problem occurs when I try to run this code, becuse I always get this error:
Notice: Undefined property: Nature::$_snake in C:\***\Nature.php on line ***
However if I remove the underscore before the variable name, it works perfectly.
Can anyone please explain what did I do wrong when applied that underscore to the variable?
EDIT:
When I insert the:
protected $_snake;
to the Nature class, it works well with the underscore! I'm quite confused now.
