Question

I’m new to OOP, so this could be an extremely naive question; but whenever I attempt to pass a class local variable into a function within that class using the $this->var syntax, it flags up a syntax error in my IDE (NetBeans).

I’ve tried encasing it in parentheses (both {$this->var} and $this->{var}) but neither seem to work.

Here’s my code:

class password_class {
    public $stretch = 1;
    public $salt = 'DEFINE_SALT';
    public $algo = 'sha256';

    function create_salt() {
        $this->salt = md5(rand()).uniqid();
    }

    function hash_pass($pass, $this->algo, $this->salt, $this->stretch) {

    }
}

I don’t actually plan on using this for password security measures; it was more of a test to see the use of class variables/functions (this will be my first time creating and calling my own class).

Any help would be greatly appreciated!

Answer 1

In OOP if you use instance attribute, you don’t need to pass them as params. Infact, if you want to use $this->algo and so on you can simply do:

function hash_pass($pass) {
   // example statement
   $var = hash($this->algo, $this->salt . $pass);
}

Moreover if you need the params you can do this:

function hash_pass($pass, $algo = null, $salt = null, $stretch = null) {
   if ($salt === null)
      $salt = $this->salt;

   // other if like this
   // example statement
   $var = hash($algo, $salt . $pass);
}