PHP Program for Mean of range in array

<?php
// PHP program to find floor 
// value of mean in range l to r

// To find mean of 
// range in l to r
function findMean($arr, $l, $r)
{
    // Both sum and count 
    // are initialize to 0
    $sum = 0;
    $count = 0;

    // To calculate sum and 
    // number of elements in
    // range l to r
    for ($i = $l; $i <= $r; $i++) 
    {
        $sum += $arr[$i];
        $count++;
    }

    // Calculate floor 
    // value of mean
    $mean = floor($sum / $count);

    // Returns mean of array
    // in range l to r
    return $mean;
}

// Driver Code
$arr = array(1, 2, 3, 4, 5);
echo findMean($arr, 0, 2), "
";
echo findMean($arr, 1, 3), "
";
echo findMean($arr, 0, 4), "
";

// This code is contributed by ajit
?>