Calculate median and average in PHP

<?php
//https://en.wikipedia.org/wiki/Median

function calcAvg($arr)
{
    $avg = (array_sum($arr)/count($arr));
    return $avg;
}

function calcMedian($arr)
{
	asort($arr);
	$newArr=[];
	foreach($arr as $val){
		$newArr[]=$val;
	}
    $arr=$newArr;unset($newArr);
	
	$count = count($arr); //total numbers in array
    $middleval = floor(($count-1)/2); // find the middle value, or the lowest middle value
    if($count % 2) { // odd number, middle is the median
        $median = $arr[$middleval];
    } else { // even number, calculate avg of 2 medians
        $low = $arr[$middleval];
        $high = $arr[$middleval+1];
        $median = (($low+$high)/2);
    }
    return $median;
}

$arr=[11, 9, 3, 5, 5];

echo 'Median:'.calcMedian($arr),
'<br />Avg:'.calcAvg($arr);

?>