Fibonacci with loop solution

Fibonacci.php

<?php
/**
 * Created by PhpStorm.
 * User: adam biro
 * Date: 10/1/2015
 * Time: 7:53 PM
 */
/**
 * @param $n
 */
function fibonacci($n)
{
    $first = 0;
    $second = 1;
    echo "Fibonacci series ";
    echo $first . ' ' . $second . ' ';
    for ( $i = 2; $i < $n; $i++ ) {
        $third = $first + $second;
        echo $third . ' ';
        $first = $second;
        $second = $third;
    }
}
fibonacci(10);