[SOLVED] Wrong Output

[The Little Guy]

Why is this giving me a result of 0?

 

 

<?php 
$uniqV = array_count_values($weekDay);
$show = array();
$gvals = '';
foreach($weekDays as $day){
	if(!in_array($day,$show)){
		array_push($show,$day);
		$radCol = array_rand($chartColors);
		$gval = '<set name="'.$day.'" value="'.$uniqV[$day].'" color="'.$chartColors[$radCol].'" />';
	}
	$gvals += $gval;
}
echo $gvals;
?>

 

I echo out $gvals, and the value I get is 0 why?

 

I am expecting some HTML.