php array find duplicates, sum them up & delete duplicates

Question

i have an array:

Array 
(
[0] => Array
    (
        [setid] => 2
        [income] => 100
    )

[1] => Array
    (
        [setid] => 2
              


        

Answer 1

This should work:

$values = array();
foreach($array as $val) {
    if(isset($values[$val['setid']])) {
        $values[$val['setid']] += $val['income'];
    } else {
        $values[$val['setid']] = $val['income'];
    }
}
//all values are now in $values array, keys are setid and values are income