Question

我有一个大的50个值的大数组（例如我使用较小的数组）：

    Array
(
    [Adam Małysz] => 1
    [Justyna Kowalczyk] => 2
    [Janne Ahonen] => 3
    [Stefan Hula] => 4
    [Ole Einar Bjoerdalen] => 5
    [Jakub Janda] => 6
    [Mariusz Pudzianowski] => 7
    [Harry Potter] => 8
    [Vladimir Zografski] => 9
    [Pavel Karelin] => 10
    [Eddie Edwards] => 11
    [Apoloniusz Tajner] => 12
)

我有 n 具有不同值的较小常量数组：

Array
(
    [Adam Małysz] => 1
    [Janne Ahonen] => 2
    [Stefan Hula] => 3
    [Ole Einar Bjoerdalen] => 4
    [Vladimir Zografski] => 5
    [Pavel Karelin] => 6
    [Apoloniusz Tajner] => 7
    [Mariusz Pudzianowski] => 8
    [Jakub Janda] => 9
    [Harry Potter] => 10
)
Array
(
    [Justyna Kowalczyk] => 1
    [Apoloniusz Tajner] => 2
    [Harry Potter] => 3
    [Janne Ahonen] => 4
    [Mariusz Pudzianowski] => 5
    [Adam Małysz] => 6
    [Jakub Janda] => 7
    [Ole Einar Bjoerdalen] => 8
    [Vladimir Zografski] => 9
    [Pavel Karelin] => 10
)
Array
(
    [Adam Małysz] => 1
    [Janne Ahonen] => 2
    [Jakub Janda] => 3
    [Stefan Hula] => 4
    [Ole Einar Bjoerdalen] => 5
    [Justyna Kowalczyk] => 6
    [Harry Potter] => 7
    [Mariusz Pudzianowski] => 8
    [Vladimir Zografski] => 9
    [Apoloniusz Tajner] => 10
)

所以我想减去数组值，其中的相同键是：

Big Array：[哈利波特] =＆gt; 8
                [Mariusz Pudzianowski] =＆gt; 7

小阵列＃1：[哈利波特] =＆gt; 10个
                      [Mariusz Pudzianowski] =＆gt; 8
    小阵列＃2：[哈利波特] =＆gt; 3
                      [Mariusz Pudzianowski] =＆gt; 5

输出：小数组＃1和大数组之间的关键[哈利   波特] = 2
          密钥[Mariusz Pudzianowski]的小数组＃1和大数组之间的差异= 1

输出：小阵列＃2之间的差异   关键的大数组[哈利波特] = 5
          小数组＃2和大数组之间的关键[Mariusz Pudzianowski] = 2

基本上我被卡住了。请帮忙。

Answer 1

允许将您的大数组命名为$ bigArray，将小数组命名为$ smallArray，它们都具有键值对。现在代码应该是：

foreach($bigArray as $bigKey=>$bigValue){
    foreach($smallArray as $smallKey=>$smallValue){
        if($smallKey==$bigKey){
           $output=$bigValue-$smallValue;
           echo 'Difference between Small Array #1 and Big Array for $bigKey is '.$output;
        }
    }
}

这样对于大数组的每个元素，你将循环小数组并检查键是否匹配，如果它们匹配，那么你减去它们的值并打印它们。您也可以为其他小型数组执行此操作。

Answer 2

您可以使用array_intersect_key查找所有阵列通用的所有密钥。

$commonKeys = array_intersect_key($bigArray, $smallArray1, $smallArray2, ...)

从那里你只需要迭代$ commonKeys并进行适当的替换。类似的东西：

foreach ($commonKeys as $key) {
    $result = abs($bigArray[$key] - $smallArray1[$key]);
    echo " Difference between Small Array #1 and Big Array for key [$key] = $result";
    //you do that for each Small Array
}

减去许多数组

2 个答案: