Question

我有一个数组，每当新数据到来时它就会改变数值（它不是来自数据库）。我想计算键1和键2值，如果键1和键3匹配，即使有5个数组，它返回一个值，但我很困惑如何做到这一点，这是我有的数组：

    Array
    (
        [0] => Array
            (
                [0] => root
                [1] => 0.0
                [2] => 4428
                [3] => sshd
            )

        [1] => Array
            (
                [0] => root
                [1] => 12.5
                [2] => 1192
                [3] => sshd
            )

        [2] => Array
            (
                [0] => root
                [1] => 0.0
                [2] => 908
                [3] => udevd
            )

        [3] => Array
            (
                [0] => root
                [1] => 7
                [2] => 776
                [3] => udevd
            )

        [4] => Array
            (
                [0] => root
                [1] => 0.0
                [2] => 592
                [3] => mingetty
            )

        [5] => Array
            (
                [0] => root
                [1] => 2
                [2] => 592
                [3] => mingetty
            )

        [6] => Array
            (
                [0] => root
                [1] => 0.0
                [2] => 588
                [3] => mingetty
            )
        [7] => Array
            (
                [0] => root
                [1] => 0.0
                [2] => 0
                [3] => migration/0
            )

        [8] => Array
            (
                [0] => ntd
                [1] => 0.0
                [2] => 0
                [3] => ksoftirqd/0
            )

        [9] => Array
            (
                [0] => root
                [1] => 0.0
                [2] => 0
                [3] => ksoftirqd/0
            )

    }

我需要这样的输出：

    Array
    (
        [0] => Array
            (
                [0] => root
                [1] => 12.5
                [2] => 5620
                [3] => sshd
            )


        [1] => Array
            (
                [0] => root
                [1] => 7
                [2] => 1684
                [3] => udevd
            )

        [2] => Array
            (
                [0] => root
                [1] => 2
                [2] => 1772
                [3] => mingetty
            )


        [3] => Array
            (
                [0] => root
                [1] => 0.0
                [2] => 0
                [3] => migration/0
            )


        [4] => Array
            (
                [0] => ntd
                [1] => 0.0
                [2] => 0
                [3] => ksoftirqd/0
            )

        [5] => Array
            (
                [0] => root
                [1] => 0.0
                [2] => 0
                [3] => ksoftirqd/0
            )

    }

详细说明：

我需要创建一个脚本/代码来匹配使用键0和键3的所有数组，并且两者必须在数组内匹配。

然后我们必须总结key 1值，其他所有其他人找到数组键1和键2值，其他所有其他值找到键2。

我希望我能清楚地解释清楚，如果可能的话，我需要一个解决方案，不要发布代码，只是给我一个指导，告诉我们它是如何完成的。

我尝试了不同的东西，我认为应该有效，但我非常失败。

Answer 1

从这个简单的foreach：

开始

$result_array = array();
foreach ($start_array as $item) {
    // create a unique pair
    $key = $item[0] . ':' . $item[3];

    if (!isset($result_array[$key])) {
        // if we met this key first - add `$item` as initial value
        $result_array[$key] = $item;
    } else {
        // else just add needed data:
        $result_array[$key][1] += $item[1];
        $result_array[$key][2] += $item[2];
    }
}
print_r($result_array);
// if you need numeric keys again - use `array_values()`.
print_r(array_values($result_array));

查找，组合并求和数组值

1 个答案: