foreach($new_arr as $k => $array){
if(isset($result[$array['new_id']]['new_value'])){
$result[$array['new_id']]['new_value'] += $array['new_value'];
}else{
$result[$array['new_id']]['new_value'] = $array['new_value'];
}
我測試過,沒問題,如果還有什麽不對的隨時留言。