How to pass variables to static method?

Question

PHP

I need to pass one variable to the method, he has the rest necessary for work in the class, but he does not see them and says Undefined variable about b and c
How best to do in this case? Put them inside the method directly? What if they are needed in another class method?

class MyClass
{
    private $b = 1;
    private $c = 2;
    
    public static function data($a, $b, $c){
        $res = $a + $b + $c;
        return $res;
    }
}

$res = MyClass::data(25);

Answer 1

You can declare variables as static:

class MyClass
{
    private static $b = 1;
    private static $c = 2;

    public static function data($a){
        $res = $a + static::$b + static::$c;
        return $res;
    }
}

$res = MyClass::data(25);