sort descending in php code example

Example 1: php sort hight to low

$letters=array("b","a","c");
arsort($letters); //referse sort an array ("c","a","b")

Example 2: php rearrange array

function rearrange_array($array, $key) {
    while ($key > 0) {
        $temp = array_shift($array);
        $array[] = $temp;
        $key--;
    }
    return $array;
}