PHP: return any specific (2nd or 3rd largest) number from array

gistfile1.php

<?php

function whats_largest($arr, $idx)
{
    sort($arr, SORT_NUMERIC);
    return($arr[count($arr) - intval($idx)]);
}


$array = array();

for ($i = 1; $i <= 10; $i++) {
  array_push($array, rand ( 1, 1000 ));
}

print_r($array);

echo whats_largest($array,2);