一个二维数组根据某个字段相加然后去重的操作

[0] => array(4) {
    ["id"] => int(1)
    ["bid"] => int(1)
    ["sales"] => string(2) "15"
    ["price"] => string(4) "5975"
  }
  [1] => array(4) {
    ["id"] => int(2)
    ["bid"] => int(1)
    ["sales"] => string(1) "2"
    ["price"] => string(3) "659"
  }
  [2] => array(2) {
    ["id"] => int(3)
    ["bid"] => int(1)
  }
  [3] => array(2) {
    ["id"] => int(4)
    ["bid"] => int(1)
  }
  [4] => array(4) {
    ["id"] => int(5)
    ["bid"] => int(1)
    ["sales"] => string(1) "1"
    ["price"] => string(3) "256"
  }

我要根据bid把sales累加和price累加,人后去掉重复的bid只保留一个,方法:

$new = array();
            foreach ($store_i1 as $k=>$v){
                if(isset($new[$v['bid']])){
                    $new[$v['bid']]['sales'] += $v['sales'];
                    $new[$v['bid']]['price'] += $v['price'];
                }else{
                    $new[$v['bid']]['sales'] = $v['sales'];
                    $new[$v['bid']]['price'] = $v['price'];
                }

            }

输出结果:

 [1] => array(2) {
    ["sales"] => int(18)
    ["price"] => int(6890)
  }
  [3] => array(2) {
    ["sales"] => int(0)
    ["price"] => int(0)
  }
  [2] => array(2) {
    ["sales"] => string(3) "0"
    ["price"] => string(5) "0"
  }