<?php

$a = array(130, 1805, 1337);

$keys = array_keys($a); rsort($keys, SORT_NUMERIC);
$values = array_values($a); rsort($values, SORT_NUMERIC);

$a = array_combine(array_slice($keys, 0, 3), array_slice($values, 0, 3));

print_r($a);

?>