我需要帮助对数组中的值求和。该数组称为 $results,我需要对每个月的 Total_Sales 值进行求和。编辑-我有下面的循环,我需要得到结果;但是我收到通知。如何改进代码以免收到这些通知?
这是数组:
array(4) {
[0]=>
array(3) {
["Month"]=>
string(1) "1"
["Country"]=>
string(2) "AU"
["Total_Sales"]=>
string(7) "9095.70"
}
[1]=>
array(3) {
["Month"]=>
string(1) "1"
["Country"]=>
string(2) "CA"
["Total_Sales"]=>
string(9) "113993.00"
}
[2]=>
array(3) {
["Month"]=>
string(1) "2"
["Country"]=>
string(2) "AU"
["Total_Sales"]=>
string(7) "7393.65"
}
[4]=>
array(3) {
["Month"]=>
string(1) "2"
["Country"]=>
string(2) "CA"
["Total_Sales"]=>
string(9) "100279.43"
}
array(2) {
[1]=>
array(2) {
["MONTH"]=>
string(1) "1"
["Total_Sales"]=>
float(123088.7)
}
[2]=>
array(2) {
["MONTH"]=>
string(1) "2"
["Total_Sales"]=>
float(107673.08)
}
我知道我需要循环,但不知道从这里去哪里。
$newarr=array();
foreach($results as $key) {
}
$newarr=array();
foreach($results as $value) {
$Month = $value['MONTH'];
$Total_Sales = $value['Total_Sales'];
array_key_exists( $Month, $newarr ) ? $newarr[$Month]['MONTH'] = $Month : $newarr[$Month]['MONTH'] = 0;
array_key_exists( $Month, $newarr ) ? $newarr[$Month]['Total_Sales']+=$Total_Sales : $newarr[$Month]['Total_Sales'] = 0;
}
注意:未定义索引:Total_Sales位于/var/www/html/analytics/views/sales_year_line_data.php第134行
注意:未定义索引:Total_Sales位于/var/www/html/analytics/views/sales_year_line_data.php第134行
我收集了你需要的数组的键是月份整数(我可以看到它从 1 开始)。
让我们尝试一下:
$totals = array();
foreach ($results as $result) {
$currentMonth = $result['Month'];
// For the first record for a given month, we need to add an "empty" record
if (!array_key_exists($currentMonth, $totals)) {
$totals[$currentMonth] = array(
'MONTH' => $currentMonth,
'Total_Sales' => 0,
);
}
// Then we can sum totals
$totals[$currentMonth]['Total_Sales'] += $result['Total_Sales'];
}
var_dump($results)
给我:
array (size=2)
1 =>
array (size=2)
'MONTH' => string '1' (length=1)
'Total_Sales' => float 123088.7
2 =>
array (size=2)
'MONTH' => string '2' (length=1)
'Total_Sales' => float 107673.08
在循环中,您只需添加值:
$newarr=array();
foreach($results as $val) {
// index your new array by month so you can easily add to total sales
$month = $val['Month'];
$newarr[$month]['Month'] = $month;
$newarr[$month]['Total_Sales'] += $val['Total_Sales'];
}
// to get rid of your month-based index, use array_values
$finalarray = array_values($newarr);