我想在桌子上总结一下

Question

Array ( 
    [1] => Array ( 
        [poidsTot] => 1 
        [idBout] => 1 
    ) 
    [2] => Array ( 
        [poidsTot] => 2 
        [idBout] => 1 
    ) 
    [3] => Array ( 
        [poidsTot] => 2 
        [idBout] => 2 
    ) 
    [4] => Array ( 
        [poidsTot] => 8 
        [idBout] => 2 
    ) 
) 

This is a table containing several arrays with two values ​​each. The value1 is a weight and the value2 is an identifier. I want to sum all the weights with the same identifier. help. thank you in advance!

Answer 1

$newarr is a new array of sum

$newarr = array();
foreach($a as $onea)
{
    $newarr[$onea['idBout']]+= $onea['poidsTot'];
}

which results in:

Array
(
    [1] => 3
    [2] => 10
)

https://eval.in/776652