PHP Fibonacci number

fibonacci.php

<?
	// array to store sequence - initialised with first 2 numbers
	$nums = array(0,1);
	
	// loop 20 times creating more numbers in the sequence
	for($i = 1; $i <=20; $i++) {
		$next = $nums[$i]+$nums[$i-1];
		array_push($nums,$next);
	}

	// output sequence, one number per new line
	foreach ($nums as $num => $val) {
		echo '<br />'.$val;
	}
?>