PHP loop template {cycle}

cycle.loop.php

<?php
//btools.eu PHP function to cycle array values (smarty {cycle} replacement)
function _bCycle(&$arr)
{
	$v = next($arr);
	if ($v === false)
		return reset($arr);
	return $v;
}
$table_colors = array('white','red','yellow');
//....for ...
echo '<tr style="background-color:'._bCycle($table_colors).'";>";
//easy as it gets ..
//array must have numbers or arrays, and not be empty