Fibonacci sequence

Fibonacci

<?php

echo fibonacciCode($argv[1]) . PHP_EOL;

/**
  * This function returns the fibonacci sequence 
  * 
  * @param mixed sequence 
  * @return int total
  */

function fibonacciCode($sequence = 0) {
	$total = 0;
	$i = 0;
	$a = 0;
	$b = 1;

	while ($i < $sequence) {
		$total = $a + $b;
		$i++;
		$a = $b;
		$b = $total;
	}

	return (int)$total; 	
}