如何在3个相等的键值上求和关联数组值

Question

我必须在相同的id，大小和类型上加入数组数组，并在php中加上num键值。我找到了只有一个键的解决方案，但我需要匹配3个键

Array
(
    [3] => Array
        (
            [id] => 460
            [size] => 24
            [num] => 1
            [price] => 6800.00
            [type] => 1
        )

    [2] => Array
        (
            [id] => 460
            [size] => 24
            [num] => 1
            [price] => 6800.00
            [type] => 1
        )

    [1] => Array
        (
            [id] => 460
            [size] => 24
            [num] => 1
            [price] => 6800.00
            [type] => 2
        )

)

我需要得到如下所示的数组，其中每个都保持不变，只有num字段被求和，其中id，type和size键值相同

阵     （

    [2] => Array
        (
            [id] => 460
            [size] => 24
            [num] => 2
            [price] => 6800.00
            [type] => 1
        )

    [1] => Array
        (
            [id] => 460
            [size] => 24
            [num] => 1
            [price] => 6800.00
            [type] => 2
        )

)

Answer 1

我已经很简单地解决了，使用像这个例子中的临时数组

    $newArr = array();
foreach($your_arr as $key=>$val){
    $index = $val['context'].$val[1];
    if(isset($newArr[$index])){
        $val_0 = $newArr[$val['context'].$val[1]][0] + $val[0];
        $newArr[$val['context'].$val[1]] = array($val_0, $val[1], 'context'=>$val['context']);
    }else{
        $newArr[$val['context'].$val[1]] = $val;
    }
}
$result = array_values($newArr);
print '<pre>';
print_r($result);
print '</pre>';