来自MySQL Query的PHP数组中的累积和

Cumulative sum in PHP Array from MySQL Query

我想对MySQL查询中的数据进行累积和。我的SQL查询已经很好地工作了，但我不知道如何累积列"sum a"的总和。我想保留MySQL查询表中的日期，但下一个索引将具有此索引和上一个索引的累积和。

我的mysql查询数组如下。

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[0] => Array
(
[data] => 2017-11-01
[SUMA] => 19
)

[1] => Array
(
[data] => 2017-11-02
[SUMA] => 97
)

[2] => Array
(
[data] => 2017-11-03
[SUMA] => 296
)

[3] => Array
(
[data] => 2017-11-05
[SUMA] => 58
)

[4] => Array
(
[data] => 2017-11-06
[SUMA] => 216
)

[5] => Array
(
[data] => 2017-11-07
[SUMA] => 194
)

[6] => Array
(
[data] => 2017-11-08
[SUMA] => 444
)

[7] => Array
(
[data] => 2017-11-09
[SUMA] => 301
)

[8] => Array
(
[data] => 2017-11-10
[SUMA] => 213
)

[9] => Array
(
[data] => 2017-11-11
[SUMA] => 5
)

[10] => Array
(
[data] => 2017-11-12
[SUMA] => 8
)

[11] => Array
(
[data] => 2017-11-13
[SUMA] => 186
)

[12] => Array
(
[data] => 2017-11-14
[SUMA] => 227
)

[13] => Array
(
[data] => 2017-11-15
[SUMA] => 180
)

[14] => Array
(
[data] => 2017-11-16
[SUMA] => 225
)

)我想要这个数组或新数组如下：

[0] => Array
(
[data] => 2017-11-01
[SUMA] => 19
)

[1] => Array
(
[data] => 2017-11-02
[SUMA] => 116
)

[2] => Array
(
[data] => 2017-11-03
[SUMA] => 412
)

[3] => Array
(
[data] => 2017-11-05
[SUMA] => 470
)

[4] => Array
(
[data] => 2017-11-06
[SUMA] => 686
)

[5] => Array
(
[data] => 2017-11-07
[SUMA] => 880
)

[6] => Array
(
[data] => 2017-11-08
[SUMA] => 1324
)

[7] => Array
(
[data] => 2017-11-09
[SUMA] => 1625
)

[8] => Array
(
[data] => 2017-11-10
[SUMA] => 1838
)

[9] => Array
(
[data] => 2017-11-11
[SUMA] => 1843
)

[10] => Array
(
[data] => 2017-11-12
[SUMA] => 1851
)

[11] => Array
(
[data] => 2017-11-13
[SUMA] => 2037
)

[12] => Array
(
[data] => 2017-11-14
[SUMA] => 2264
)

[13] => Array
(
[data] => 2017-11-15
[SUMA] => 2444
)

[14] => Array
(
[data] => 2017-11-16
[SUMA] => 2699
)

我试过这样做，但它只显示我最后的日期和完整的累积而不是每个索引。

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while ($row = mysqli_fetch_assoc($result)) {

$myArray['data'] = $row['data'];
$myArray['suma'] += $row['SUMA'];
}

相关讨论

创建数组时执行此操作

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$s=0;
$myArray = [];
while ($row = mysqli_fetch_assoc($result)) {
$temp['data'] = $row['data'];
$s = $temp['suma'] = $row['SUMA'] + $s;
$myArray[] = $temp;
}
echo '[cc lang="php"]';
print_r($myArray);

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<?php

$array=array(
0 => Array
(
'data' => '2017-11-01',
'SUMA' => 19
),

1 => Array
(
'data' => '2017-11-02',
'SUMA' => 97
),

2 => Array
(
'data' => '2017-11-03',
'SUMA' => 296,
),

3 => Array
(
'data' => '2017-11-05',
'SUMA' => 58,
),

);

$i=0;

while ($i<count($array) )
{
if($i==0) {
$newArray[0]['data'] = $array[$i]['data'];
$newArray[0]['SUMA'] = $array[$i]['SUMA'];

}
else{
$newArray[$i]['data']=$array[$i]['data'];
$newArray[$i]['SUMA']=$array[$i]['SUMA']+$newArray[$i-1]['SUMA'];

}
$i++;

}
echo '[cc lang="php"]';
print_r($newArray);

输出为：

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Array
(
[0] => Array
(
[data] => 2017-11-01
[SUMA] => 19
)

[1] => Array
(
[data] => 2017-11-02
[SUMA] => 116
)

[2] => Array
(
[data] => 2017-11-03
[SUMA] => 412
)

[3] => Array
(
[data] => 2017-11-05
[SUMA] => 470
)

)

您可以删除if/else，只保留其余部分，但您会收到阵列位置-1的通知。代码运行良好。您只需禁用通知警告(我不建议只有在100%确定的情况下才这样做)