php多维数组用于键和获取值

Question

I have the following code sample:

$arr = array(
  array(
    'packid'=> '1', 'total' => '30'),
  array(
    'packid'=> '2', 'total' => '20')
);

$arr is in a loop

 foreach ($pack->memberPack as $memPack) {
            if($memPack->packId = $search_arr_key)
            //get the `total` value then do something
        }

and $memPack object like this:

array(1) {
["memberPack"]=>
array(1) {
  [0]=>
  object(MemberPack)#290 (6) {
    ["errors"]=>
    NULL
    ["attributes":"ActiveRecord\Model":private]=>
    array(3) {
      ["memberPackId"]=>
      int(1)
      ["packId"]=>
      int(1)
      ["memberId"]=>
      int(14369)
    }  
  }
}

}

How can i search the key packId equal to $memPack->packId and get the match total? (ex. if packId =2 and get the value 20 )

Answer 1

For better performance, here is a good implementation.

$array = array_combine(array_column($arr, 'packId'), array_column($arr, 'total'));
$total = $array[$memPack->packId];