Collatz

<?php
 
$c = new Collatz();
 
echo $c->run(256);
 
echo $c->steps();
 
class Collatz {
 
    private $steps;
 
    public function __construct() {
 
        $this->steps = 0;
 
    }
 
    public function steps() {
 
        return $this->steps;
 
    }
 
    public function run($n) {
 
        $result;
 
        if ($n == 1) {
 
            $result = 1;
 
        } else if ($n % 2 == 0) {
 
            $result = $this->run($n / 2);
 
        } else {
 
            $result = $this->run($n * 3 + 1);
 
        }
 
        if ($n != 1) $this->steps++;
 
        return $result;
 
    }
 
}