[英]Sum up array values by keys
I need to sum up some values from subarrays in an array. 我需要总结数组中子数组的一些值。
I have this array 我有这个数组
Array
(
[smecid_2] => Array
(
[0] => 1
[1] => SMEC 55.6
[2] => 960
[3] => 864
[4] => 960
[5] => 864
)
[smecid_6] => Array
(
[0] => 3
[1] => SMEC 55.6 ATEX EX
[2] => 1290
[3] => 1161
[4] => 3870
[5] => 3483
)
)
What I want to do is sum up all fields from key [4] of each subarray and be able to echo the total in $total; 我想要做的是总结每个子数组的键[4]中的所有字段,并能够在$ total中回显总数;
In this example $total;
在此示例中, $total;
would be 4830
(960+3870). 将是4830
(960 + 3870)。
Also, the array could hold more subarrays then these 2, when a user submits more products to order. 此外,当用户提交更多要订购的产品时,该阵列可以容纳比这2个更多的子阵列。
<?php
$array = array
(
'smecid_2' => array
(
0 => 1,
1 => 'SMEC 55.6',
2 => 960,
3 => 864,
4 => 960,
5 => 864,
),
'smecid_6' => array
(
0 => 3,
1 => 'SMEC 55.6 ATEX EX',
2 => 1290,
3 => 1161,
4 => 3870,
5 => 3483,
)
);
$sum = 0;
foreach ($array as $subarray)
{
$sum += $subarray[4];
}
echo $sum;
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