我有一个带有一些数据的多维数组。
Array ID Date Quantity
66998 [0] [2011-05-11] [50]
[1] [2011-05-15] [50]
[2] [2011-05-15] [50]
81158 [0] [2011-05-11] [25]
[1] [2011-05-12] [60]
[2] [2011-05-16] [60]
[3] [2011-05-18] [60]
我想在同一周内将订单中的所有数量加起来。我可以用以下方式计算周数:
$WeekNumber = date("W", $UnixTimestamp);
所以最终的数组应如下所示:
Week Quantity
66998 [0] [19] [150]
81158 [0] [19] [85]
[1] [20] [120]
该数组是从MS SQL数据库生成的。
答案 0 :(得分:1)
您可以使用array_reduce($array, 'function_name')
一次一步地生成结果数组。
function calc_weeks($result, $row)
{
. . .
$WeekNumber = date("W", $UnixTimestamp);
$result[$weekNumber] += $row['quantity'];
return $result;
}
array_reduce($array, 'calc_weeks', array());
或者,您可以使用SQL来计算周数并以此方式汇总订单。在MySQL中,该函数称为WEEK()
。对于MS SQL,有一个related question here。
答案 1 :(得分:1)
操作我的3D array理论:(参见我在OP问题中的评论)
<?php
$array = array(66998 => array(array('ID' => 0,
'Date' => '2011-05-11',
'Quantity' => 50),
array('ID' => 1,
'Date' => '2011-05-15',
'Quantity' => 50),
array('ID' => 2,
'Date' => '2011-05-15',
'Quantity' => 50)
),
81158 => array(array('ID' => 0,
'Date' => '2011-05-11',
'Quantity' => 25),
array('ID' => 1,
'Date' => '2011-05-12',
'Quantity' => 60),
array('ID' => 2,
'Date' => '2011-05-16',
'Quantity' => 60),
array('ID' => 3,
'Date' => '2011-05-18',
'Quantity' => 60)
));
$newArray = array();
foreach($array as $subKey => $subArray) {
foreach($subArray as $idArray) {
$week = date("W", strtotime($idArray['Date']));
$newArray["{$subKey}"]["{$week}"] = $idArray['Quantity'] + $newArray["{$subKey}"]["{$week}"];
}
}
var_dump($newArray);
?>
产生您想要的结果(2D为简单起见):
array(2) {
[66998]=>
array(1) {
[19]=>
int(150)
}
[81158]=>
array(2) {
[19]=>
int(85)
[20]=>
int(120)
}
}
快乐的编码!