根据一列值对子数组数据进行分组和合并

本文介绍了根据一列值对子数组数据进行分组和合并的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我下面的PHP代码中有一个数组，我想将此数组转换为按数据值分组。总是很难简化数组。

I have an array in PHP code below, and I want to convert this array to be grouped by data value. It's always hard to simplify arrays.

原始数组：

Array ( [0] => Array ( [date] => 2017-08-22 [AAA] => 1231 ) [1] => Array ( [date] => 2017-08-21 [AAA] => 1172 ) [2] => Array ( [date] => 2017-08-20 [AAA] => 1125 ) [3] => Array ( [date] => 2017-08-21 [BBB] => 251 ) [4] => Array ( [date] => 2017-08-20 [BBB] => 21773 ) [5] => Array ( [date] => 2017-08-22 [CCC] => 3750 ) [6] => Array ( [date] => 2017-08-20 [CCC] => 321750 ) )

下面是我想要的数组：

Array ( [2017-08-22] => Array ( [AAA] => 1231 [CCC] => 3750 ) [2017-08-21] => Array ( [AAA] => 1172 [BBB] => 251 ) [2017-08-20] => Array ( [AAA] => 1125 [BBB] => 21773 [CCC] => 321750 ) )

如果数据不存在，则具有空null值也是可以的。 [BBB] =>对于2017-08-22为NULL。 有人可以帮忙吗？预先感谢...

It is also ok to have empty null value if the data doesn't exist. [BBB] => NULL for 2017-08-22. Can anybody help? Thanks in advance...

推荐答案

一个简单的循环就可以做到这一点。

A simple loop should do this..

$group = []; foreach ($data as $item) { if (!isset($group[$item['date']])) { $group[$item['date']] = []; } foreach ($item as $key => $value) { if ($key == 'date') continue; $group[$item['date']][$key] = $value; } }