多维数组中的和值

Question

我正在尝试显示自开始使用此阵列以来每个广告系列号码的总安装量。

    Array
(
    [27] => Array
        (
            [0] => Array
                (
                    [date] => 2018-04-09
                    [hour] => 7
                    [campaign] => 27
                    [installs] => 2
                    [trials] => 0
                )

            [1] => Array
                (
                    [date] => 2018-04-09
                    [hour] => 3
                    [campaign] => 39
                    [installs] => 1
                    [trials] => 0
                )

            [2] => Array
                (
                    [date] => 2018-04-09
                    [hour] => 5
                    [campaign] => 39
                    [installs] => 1
                    [trials] => 0
                )

            [3] => Array
                (
                    [date] => 2018-04-09
                    [hour] => 6
                    [campaign] => 39
                    [installs] => 1
                    [trials] => 0
                )

            [4] => Array
                (
                    [date] => 2018-04-09
                    [hour] => 8
                    [campaign] => 39
                    [installs] => 2
                    [trials] => 0
                )
        )

    [53] => Array
        (
            [0] => Array
                (
                    [date] => 2018-04-10
                    [hour] => 3
                    [campaign] => 53
                    [installs] => 1
                    [trials] => 0
                )

            [1] => Array
                (
                    [date] => 2018-04-10
                    [hour] => 9
                    [campaign] => 53
                    [installs] => 1
                    [trials] => 0
                )

            [2] => Array
                (
                    [date] => 2018-04-10
                    [hour] => 5
                    [campaign] => 55
                    [installs] => 1
                    [trials] => 0
                )

            [3] => Array
                (
                    [date] => 2018-04-10
                    [hour] => 12
                    [campaign] => 55
                    [installs] => 1
                    [trials] => 0
                )

        )

    [61] => Array
        (
            [0] => Array
                (
                    [date] => 2018-04-15
                    [hour] => 0
                    [campaign] => 61
                    [installs] => 27
                    [trials] => 1
                )

            [1] => Array
                (
                    [date] => 2018-04-15
                    [hour] => 1
                    [campaign] => 61
                    [installs] => 18
                    [trials] => 0
                )
                [2] => Array
                (
                    [date] => 2018-04-15
                    [hour] => 1
                    [campaign] => 27
                    [installs] => 10
                    [trials] => 0
                )

我的阵列如上所示。您可以看到某些广告系列号在不同日期重复显示。我的结果应该是这样的：

运动27：12
运动39：5
运动53：2
运动55：2
运动61：45

到目前为止，我已经有了这个，似乎并没有打印所有的数据。

    $newarray = array();
$last = count($res) - 1;
foreach ($res as $i => $new){
foreach ($new as $x => $row){
    $isFirst = ($i == 0);
    $isLast = ($i == $last);
    $grabbedvalue = $row['campaign'].",".$row['installs'];
        array_push($newarray,$grabbedvalue);

}
}

print_r($newarray);

希望有人可以帮我解决这个问题。谢谢！

Answer 1

只需遍历数组并计算：

$data = [

    [
        'campaign' => 1,
        'installs' => 20, 
    ],
    [
        'campaign' => 1,
        'installs' => 5, 
    ],
    [
        'campaign' => 2,
        'installs' => 1, 
    ],
    [
        'campaign' => 2,
        'installs' => 10, 
    ],
    [
        'campaign' => 3,
        'installs' => 9, 
    ],

];

$count=array();
// Loop through the campaigns
foreach($data as $camp){
    // Check if we initiated the counting before
    if(isset($count[$camp['campaign']])){
        // Add installs count to previous value
        $count[$camp['campaign']] += $camp['installs'];
    } else {
        // Initiate the counting
        $count[$camp['campaign']] = $camp['installs'];
    }
}

var_dump($count);

这将给出：

array (size=3)
  1 => int 25
  2 => int 11
  3 => int 9

Answer 2

你应该在for循环中创建一个for循环来解决这个问题。

我可以尝试尽可能清楚地解释这些步骤：

• 创建一个新数组（$ totalInstalls）
• 循环通过您指定的阵列
• 循环通过您指定的数组中的每个元素（for循环内的循环）
• 检查当前元素的广告系列索引是否已存在于$ totalInstalls
中
• 如果没有将其设置为安装
• 如果确实存在，则将其增加一个