如何排序并从数组中获取最小值和最大值？

Question

我得到了 2 个数组

//each array contains 8 values
$ids = Array(1441, 1313, 1123, 1316, 1313, 1313, 1123, 1567);
//each id has a value in $data array
$data = Array(2, 3, 8, 4, 5, 4, 2, 9);

//here is my problem: 
$max_data = array_product($data); //but not all values from $data only these:
$ids = [1441,1123,1316,1313,1567]; //these are the ids with highest data.
echo $max_data; //result must be 2880 (2 * 8 * 4 * 5 * 9)
$min_data = array_product($data); //and now
$ids = [1441,1313,1316,1123,1567]; //these are the ids with lowest data.
echo $max_data; //result must be 432 (2 * 3 * 4 * 2 * 9)

我希望，我能够解释我的问题。

谢谢。

---

解决了。

我做了一个函数来获取最大值和最小值。我想得到更好的答案，谢谢！

<?php
$ids = Array(1441, 1313, 1123, 1316, 1313, 1313, 1123, 1567);           
$data = Array(2, 3, 8, 4, 5, 4, 2, 9);
function getMaxData($ids, $data)
{
    (int)$_total = 1;
    array_multisort($ids, $data, SORT_DESC);
    foreach(array_unique($ids) as $key => $value)
        $_total *= $data[$key];
    return $_total;
}
function getMinData($ids, $data)
{
    (int)$_total = 1;
    array_multisort($ids, $data, SORT_ASC);
    foreach(array_unique($ids) as $key => $value)
        $_total *= $data[$key];
    return $_total;
}
echo "Max: ".getMaxData($ids, $data)."<br />";
echo "Min: ".getMinData($ids, $data)."<br />";
?>

Answer 1

我不确定我是否正确理解，但关联数组不是您需要的吗？

$foo = Array(2 => 1441, 3 => 1313 .... )

http://php.net/manual/en/language.types.array.php