我有一个多维数组。
$count = count($main_array); // 6000+
主数组中的每个元素都有大约 25 个键
$count_sub_array = count($main_array[0]); // 25
对于其中一个键,我有大约 3000 个唯一值。IE
for($i=0; $i< $count; $i++){
if($main_array[$i][$match]){
array_push($unique_array,$main_array[$i][$match]);
}
}
$unique_array = array_unique($unique_array); // count - 3000
我想遍历数组中的每个元素并按唯一类型对它们进行分组。而且我还希望根据特定索引之一对元素进行分组,例如
$unique_index = array('2012-08','2012-07','2012-06','2012-05','2012-04','2012-03','2012-02', '2012-01');
#目前唯一索引的计数是13
所以结果看起来像:
array (size=2689)
0 =>
array (size=5)
'type' => string 'abc' (length=19)
'totalCost' =>
array (size=13)
'2012-07-01' => float 790.08
'2012-08-01' => float 1501.84
'2012-09-01' => float 1568.9
'2012-10-01' => float 2756.04
'2012-11-01' => float 2428.42
'2012-12-01' => float 1901.09
'2013-01-01' => float 2538.59
'2013-02-01' => float 1537.57
'2013-03-01' => float 1674.51
'2013-04-01' => float 1141.01
'2013-05-01' => float 764.24
'2013-06-01' => float 1179.84
'2013-07-01' => float 1252.66
'numOrders' =>
array (size=13)
'2012-07-01' => int 16
'2012-08-01' => int 66
'2012-09-01' => int 65
'2012-10-01' => int 59
'2012-11-01' => int 60
'2012-12-01' => int 47
'2013-01-01' => int 85
'2013-02-01' => int 50
'2013-03-01' => int 46
'2013-04-01' => int 41
'2013-05-01' => int 22
'2013-06-01' => int 32
'2013-07-01' => int 47
'TotalRevenue' =>
array (size=13)
'2012-07-01' => float 1695.99
'2012-08-01' => float 7418.17
'2012-09-01' => float 7827.99
'2012-10-01' => float 7929.63
'2012-11-01' => float 4815.74
'2012-12-01' => float 5592.59
'2013-01-01' => float 6874.02
'2013-02-01' => float 11599.49
'2013-03-01' => float 10358.57
'2013-04-01' => float 6909.55
'2013-05-01' => float 6983.38
'2013-06-01' => float 7211.84
'2013-07-01' => float 10422.59
'profit' =>
array (size=13)
'2012-07-01' => float 905.91
'2012-08-01' => float 5916.33
'2012-09-01' => float 6259.09
'2012-10-01' => float 5173.59
'2012-11-01' => float 2387.32
'2012-12-01' => float 3691.5
'2013-01-01' => float 4335.43
'2013-02-01' => float 10061.92
'2013-03-01' => float 8684.06
'2013-04-01' => float 5768.54
'2013-05-01' => float 6219.14
'2013-06-01' => float 6032
'2013-07-01' => float 9169.93
1 =>
array (size=5)
'type' => string 'bcd' (length=26)
'totalCost' =>
array (size=13)
'2012-07-01' => float 599.53
'2012-08-01' => float 419.18
'2012-09-01' => float 212.63
'2012-10-01' => float 462.55
'2012-11-01' => float 450.08
'2012-12-01' => float 447.1
'2013-01-01' => float 657
'2013-02-01' => float 734.68
'2013-03-01' => float 1006.91
'2013-04-01' => float 1497.95
'2013-05-01' => float 2100.96
'2013-06-01' => float 3845.33
'2013-07-01' => float 6817.38
'numOrders' =>
array (size=13)
'2012-07-01' => int 11
'2012-08-01' => int 33
'2012-09-01' => int 25
'2012-10-01' => int 28
'2012-11-01' => int 33
'2012-12-01' => int 28
'2013-01-01' => int 33
'2013-02-01' => int 45
'2013-03-01' => int 54
'2013-04-01' => int 53
'2013-05-01' => int 69
'2013-06-01' => int 91
'2013-07-01' => int 180
'TotalRevenue' =>
array (size=13)
'2012-07-01' => float 1201.32
'2012-08-01' => float 4889.65
'2012-09-01' => float 2171.5
'2012-10-01' => float 2573.75
'2012-11-01' => float 2375.1
'2012-12-01' => float 2807.28
'2013-01-01' => float 2933.05
'2013-02-01' => float 5534.61
'2013-03-01' => float 6946.02
'2013-04-01' => float 8555.78
'2013-05-01' => float 8202.32
'2013-06-01' => float 14140.04
'2013-07-01' => float 22043.54
'profit' =>
array (size=13)
'2012-07-01' => float 601.79
'2012-08-01' => float 4470.47
'2012-09-01' => float 1958.87
'2012-10-01' => float 2111.2
'2012-11-01' => float 1925.02
'2012-12-01' => float 2360.18
'2013-01-01' => float 2276.05
'2013-02-01' => float 4799.93
'2013-03-01' => float 5939.11
'2013-04-01' => float 7057.83
'2013-05-01' => float 6101.36
'2013-06-01' => float 10294.71
'2013-07-01' => float 15226.16
);
如何优化循环?
目前我有以下逻辑:
1. get the main array from mysql
2. get unique elements
3. foreach unique element
a. foreach key like '2013-06-01', '2013-07-01'
b. foreach main array
match above key i.e. if($time == '2013-06-01')
c. get $value['totalCost'], $value['numOrders'], $value['profit'], value['revenue']
据我所知,这个循环的复杂度是:3000 * 13 * 6000;
我在这里先向您的帮助表示感谢。