多维关联数组PHP的总和 [英] Sum of multidimensional associative array PHP
本文介绍了多维关联数组PHP的总和的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
数组
(
[Sum_1] =>数组
(
[0] =>数组
[e] => 1000001
[u] => Test1
[a] => 775.00
)
[1] => Array
(
[e] => 26
[u] => Test2
[a] => 555.00
)
)
[Sum_2] => Array
(
[0] => Array
(
[e] => 1000001
[u] => Test1
[a] => 110.00
)
)
[Sum_3] =>数组
(
[0] =>数组
(
[e] => 1000001
[u] => Test1
[a] => 444.00
)
)
)
我想把上面的数组转换成下面的样子。
数组
(
[Sum_1])是否需要使用foreach或array_sum可以做到这一点? => 1330.00
[Sum_2] => 110.00
[Sum_3] => 444.00
)
(我想得到Sum_1,Sum_2,Sum_3每个部分的元素[a]的总和
感谢您的帮助!
<你可以这样做:
$ ret = array_map (函数($ val){
return array_sum(array_map(function($ val){
return $ val ['a'];
},$ val));
},$ array);
在php 5.4之前:
函数a_getter($ val){
return $ val ['a'];
}
$ ret = array_map(function($ val){
return array_sum(array_map('a_getter',$ val));
},$ array);
Array
(
[Sum_1] => Array
(
[0] => Array
(
[e] => 1000001
[u] => Test1
[a] => 775.00
)
[1] => Array
(
[e] => 26
[u] => Test2
[a] => 555.00
)
)
[Sum_2] => Array
(
[0] => Array
(
[e] => 1000001
[u] => Test1
[a] => 110.00
)
)
[Sum_3] => Array
(
[0] => Array
(
[e] => 1000001
[u] => Test1
[a] => 444.00
)
)
)
I want to convert above array to something like below. Do I need to use a foreach or can array_sum do this?
Array
(
[Sum_1] => 1330.00
[Sum_2] => 110.00
[Sum_3] => 444.00
)
(I want to get the sum of element [a] of each section named Sum_1, Sum_2, Sum_3) Thanks for your help!
解决方案
You could do like this:
$ret = array_map(function($val) {
return array_sum(array_map(function($val) {
return $val['a'];
}, $val));
}, $array);
Prior to php 5.4:
function a_getter($val) {
return $val['a'];
}
$ret = array_map(function($val) {
return array_sum(array_map('a_getter', $val));
}, $array);
这篇关于多维关联数组PHP的总和的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文