PHP在多维数组中的Sum键与另一个键匹配

I have a multidimensional array and I need to add up some of the data.

我有一个多维数组，我需要添加一些数据。

My array looks like this (there is a lot more data I cropped out for the example):

我的数组看起来像这样（我为这个例子裁剪了更多的数据）：

Array
(
    [0] => Array
        (
            [date] => 20-02-2014
            [tool] => mystuff1
            [usage] => 447
            [minutes] => 6705
        )

    [1] => Array
        (
            [date] => 20-02-2014
            [tool] => mystuff2
            [usage] => 20
            [minutes] => 1200
        )

There will be more than one sub-array that has tool=mystuff1 and I want to add the "minutes" key up for all the ones that have mystuff1. Ultimately I want to do the same with mystuff2 added up (there are other 'tool' keys besides those that will be done as well.)

将有多个具有tool = mystuff1的子数组，并且我想为所有具有mystuff1的子项添加“分钟”键。最终我想对mystuff2加起来做同样的事情（除了那些将要完成的工具之外还有其他'工具'键。）

Ive tried several examples I found on this site but they all seem sum based on the 1 key name i.e. 'minutes' but not anything I can find where I can sum the 'minutes' when 'tool' also matches.

我已经尝试了几个我在这个网站上找到的例子，但它们看起来总是基于1个关键名称，即'分钟'，但我找不到任何可以在“工具”匹配的时候总结“分钟”的地方。

1 个解决方案

#1

You can loop through your array and add the minutes value to the array key of an output array:

您可以循环遍历数组并将分钟值添加到输出数组的数组键：

$output = array();

foreach($your_array as $current) {
    // create the array key if it doesn't exist already
    if(!array_key_exists($current['tool'], $output))
        $output[$current['tool']] = 0;

    // add minutes to the current tool total
    $output[$current['tool']] += $current['minutes'];
}

This way you can expect a result like this:

这样你可以得到这样的结果：

Array
(
    [mystuff1] => 6705
    [mystuff2] => 1200
)

#1