如何從數組中隨機獲取最小值？

Question

我有一個具有多個相似最小值的數組。 我可以知道如何隨機獲得最小值之一嗎？

這是我的示例代碼：-

$aryNo = array(
                    0 => 34, 1 => 34, 2 => 51, 3 => 12, 4 => 12,
                    5 => 12, 6 => 56, 7 => 876, 8 => 453, 9 => 43,
                    10 => 12
);
$b = array_keys($aryNo, min($aryNo));  //Here only can get 1 value.
$intNo = $b[0];

我可以知道如何獲取最小值列表 (3 => 12, 4 => 12,5 => 12,10 => 12) 並隨機選擇其中一個以便我可以在 $intNo 中設置嗎？

Answer 1

$aryNo = array(
    0 => 34, 1 => 34, 2 => 51, 3 => 12, 4 => 12,
    5 => 12, 6 => 56, 7 => 876, 8 => 453, 9 => 43,
    10 => 12
);
$b = array_keys($aryNo, min($aryNo));  //Here only can get 1 value.

// Taking a random KEY from $b
$key = array_rand($b);

// Taking a KEY from $aryNo which is under `$key`
echo $b[$key];

// Taking a VALUE from `$aryNo` which is under `$b[$key]`
echo $aryNo[$b[$key]];

小提琴。

Answer 2

嘗試這樣的事情：

$aryNo = [34,34,34,51,12,12,12,56,876,453,43,12];

foreach($aryNo as $a) {
 $finalArray[$a][] = $a;   
}

print("<pre>".print_r($finalArray,true)."</pre>");
$minKey = min(array_keys($finalArray));
print("<pre>".print_r($finalArray[$minKey],true)."</pre>");
$randIndex = array_rand($finalArray[$minKey]);
print_r("Key: ".$randIndex.", ".$finalArray[$minKey][$randIndex]);

第一次打印打印：

Array
(
    [34] => Array
        (
            [0] => 34
            [1] => 34
            [2] => 34
        )

    [51] => Array
        (
            [0] => 51
        )

    [12] => Array
        (
            [0] => 12
            [1] => 12
            [2] => 12
            [3] => 12
        )

    [56] => Array
        (
            [0] => 56
        )

    [876] => Array
        (
            [0] => 876
        )

    [453] => Array
        (
            [0] => 453
        )

    [43] => Array
        (
            [0] => 43
        )

)

比你 select 最小鍵，打印這個：

Array
(
    [0] => 12
    [1] => 12
    [2] => 12
    [3] => 12
)

最后，您從該數組中選擇隨機鍵並打印該值：

Key: 2, Value: 12

Answer 3

`<?php
    $sortArr = array();
    $aryNo = array(0 => 34, 1 => 34, 2 => 51, 3 => 12, 4 => 12,5 => 
    12, 6 => 56, 7 => 876, 8 => 453, 9 => 43,10 => 12);
    asort($aryNo);
$aryNo = array_values($aryNo);
print_r($aryNo);
echo $aryNo[0];
?>`

Answer 4

我發現如果我使用 shuffle(); 也為我工作。 這是我的例子： -

$aryNo = array(
                    0 => 34, 1 => 34, 2 => 51, 3 => 12, 4 => 12,
                    5 => 12, 6 => 56, 7 => 876, 8 => 453, 9 => 43,
                    10 => 12
);
 $aryNo2 = array_keys($aryNo, min($aryNo));
                shuffle($aryNo2); //
                $intWinNo = $aryNo2[0];

感謝@u_mulder 的建議和回答。