php - 在另一个值相等的数组中找到值的总和

Question

这是我拥有的数组，它是 JSON 格式，但我也找到了 PHP 版本：

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我需要在 PHP 中为每个客户端添加点击次数、展示次数等的总和。我尝试了几种不同的方法，但我只能弄清楚如何获得总和。谢谢！

///////// 编辑 //////////

我尝试使用 foreach 循环，在其中将客户端与字符串进行匹配，但这只会给我一个客户端，而不是它们的列表及其匹配的展示次数。我完全不知所措。我不知道该怎么做。我是使用数组的新手。

统计数据是假的，但阵列的布局是真实的。

//////// PHP 数组 /////////

Array
(
    [0] => Array
        (
            [client] => LawCapital                                                                                                                                                                   
            [placementID] => 592952
            [creativeID] => 728x90
            [dimensions] => 728x90
            [impressions] => 39581
            [bxd] => 4.854581
            [viewable_impressions] => 11319
            [exposure] => 54949
            [viewability_rate] => 28.5970535
            [clicks] => 344
            [mouse_overs] => 4209
        )

    [1] => Array
        (
            [client] => LawCapital                                                                                                                                                                  
            [placementID] => 592951
            [creativeID] => 300x250
            [dimensions] => 300x250
            [impressions] => 31148
            [bxd] => 4.58673525
            [viewable_impressions] => 7373
            [exposure] => 33818
            [viewability_rate] => 23.6708622
            [clicks] => 316
            [mouse_overs] => 3495
        )

    [2] => Array
        (
            [client] => LawCapital                                                                                                                                                                  
            [placementID] => 592950
            [creativeID] => 160x600
            [dimensions] => 160x600
            [impressions] => 17538
            [bxd] => 4.94013739
            [viewable_impressions] => 4076
            [exposure] => 20136
            [viewability_rate] => 23.240963
            [clicks] => 136
            [mouse_overs] => 1792
        )

score 0 · Accepted Answer

首先，使用 to array flag 而不是 to object flag in json_decode：

$array = json_decode($yourJson, true);

定义一个新数组，其中键是客户端，

遍历数组并将每一列添加到每个客户端的总和中：

foreach ($array as $key => $val) {
    if (!isset($sum[$val['client']]['impressions'])) {
        $sum[$val['client']]['impressions'] = 0;
    }

    $sum[$val['client']]['impressions'] += $val['impressions'];
    // Repeat with other columns
}

你最终会得到一个像这样的数组：

$sum['MesaArtsCenter ']['impressions'] = 1234;

这是未经测试的，但您将了解背后的想法并可以扩展自己。

如果样本数据是真实的，您是否有客户的许可才能发布他们的统计数据？

此代码有效： http : //codepad.org/9SwhEcKZ

Output: Array
(
    [LawCapital ] => Array
        (
            [impressions] => 105220
        )

    [MesaArtsCenter ] => Array
        (
            [impressions] => 11564
        )

)

score 0 · Accepted Answer

我更改了 json 数组，请替换为您的，我只从您那里获取了 3 条记录，并将点击次数更改为 1、2、3，因此总点击次数 = 6

var foo = {
            sample: [{"client":"LawCapital ","placementID":"592952","creativeID":"728x90","dimensions":"728x90","impressions":39581,"bxd":4.854581,"viewable_impressions":11319,"exposure":54949,"viewability_rate":28.5970535,"clicks":1,"mouse_overs":4209},
    {"client":"LawCapital ","placementID":"592951","creativeID":"300x250","dimensions":"300x250","impressions":31148,"bxd":4.58673525,"viewable_impressions":7373,"exposure":33818,"viewability_rate":23.6708622,"clicks":2,"mouse_overs":3495},
    {"client":"LawCapital ","placementID":"592950","creativeID":"160x600","dimensions":"160x600","impressions":17538,"bxd":4.94013739,"viewable_impressions":4076,"exposure":20136,"viewability_rate":23.240963,"clicks":3,"mouse_overs":1792}
            ]
        },
        total = 0,  //initialize the variable
        sample = foo.sample,  //JSON element  or  object literal 
        i;
    for (i = 0; i < sample.length; i++) {  //Try to loop through the array
        total += sample[i].clicks; 
    }
    alert(total);  //get the total clicks 1+2+3 = 6

score 0 · Accepted Answer

考虑到数据源是一个包含数据的 JSON 表示的字符串，生成的代码将是：

$array = json_decode($json, true); // Create an array of objects from JSON
$results = array(); // Initialize resulting array

foreach ($array as $item){

    // Initialize non-existing indexes in resulting array
    if (!isset($results[$item['client']]['impressions'])) $results[$item['client']]['impressions'] = 0; // Initialize non-existing indexes in resulting array
    if (!isset($results[$item['client']]['clicks'])) $results[$item['client']]['clicks'] = 0;

    // Add those numbers!
    $results[$item['client']]['impressions'] += $item['impressions'];
    $results[$item['client']]['clicks'] += $item['clicks'];

}

print_r ($results);

然后$results将是：

Array
(
[LawCapital ] => Array
    (
        [impressions] => 109141
        [clicks] => 966
    )

[MesaArtsCenter ] => Array
    (
        [impressions] => 53938
        [clicks] => 82
    )

[SantanVW ] => Array
    (
        [impressions] => 7772
        [clicks] => 38
...

php - 在另一个值相等的数组中找到值的总和

3 回答 3

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