Use pid as the key of the new array

$returnarr = array(); foreach($data as $val) { if(isset($returnarr[$val['pid']])) { $returnarr[$val['pid']]['amount'] += $val['amount']; } else { $returnarr[$val['pid']]['pid'] = $val['pid']; $returnarr[$val['pid']]['amount'] = $val['amount']; } }

Write a loop, judge whether there are the same ones based on pid, merge them, and finally generate a new array OK

$allok = array(); foreach ($all as $key1 => &$value1){ foreach ($value1 as $key2 => $value2){ $allok[$value2['pid']] = $value2; $allok[$value2['pid']] = $allok[$value2['pid']]['amount'] + $value2['amount']; /*$queryproductshop = Model('Product')->queryidshop($value2['pid']); $queryshopclass = Model('ProductClassify')->SaleConfigShopClass($queryproductshop['cid']); $queryproductshop['class'] = $queryshopclass['title']; $allshop[] = $queryproductshop;*/ } } dump($allok);

I have solved it myself, it is too complicated to think about it

//The code is as follows, I hope it will be helpful to you.
$orderInfo = array(

[0]=> 'pid'=>7, 'amount'=>1, [1]=> 'pid'=>7, 'amount'=>2, [2]=> 'pid'=>8, 'amount'=>1,

);
foreach ($orderInfo as $k=>$v)

{ $bKey=$v['pid']; if(!array_key_exists($bKey, $orderArr)) { $orderArr[$bKey] = []; $sumData[$bKey] = 0; } $orderArr[$bKey]=$v; $sumData[$bKey]+=$orderArr[$bKey]['amount']; $orderArr[$bKey]['amount']=$sumData[$bKey]; } var_dump($orderArr);