合并并通过在多个阵列组 [英] Merge and group by several arrays

问题描述

我需要通过名称合并关联数组和组。说我有这样的3个数组：

I need to merge associative arrays and group by the name. Say I have such 3 arrays:

ARRAY1
    "/path/file.jpg"  =>  2, 
    "/path/file2.bmp" =>  1,
    "/file3.gif"      => 5,

ARRAY2
    "/path/file.jpg"  =>  1, 
    "/path/file2.bmp" =>  1,
    "/file3.gif"      => 0,

ARRAY3
    "/path/file.jpg"  =>  1, 
    "/path/file2.bmp" =>  1,

我需要通过文件路径为这些阵列合并成一个，并将它们组合，并有自己的价值总和的结果。是这样的：

I need to merge these arrays to one and group them by filepath and have result of sum of their values. Something like:

SELECT filename, SUM(val) FROM files
GROUP BY filename

但有多个输入数组。数组是短（约20元最大值）。每个阵列可能有不同的大小。

But with multiple input arrays. Arrays are short (around 20 elements max). Each array might have different size.

推荐答案

的一种可能的方式的

$rtn = array();
foreach ($array1 as $key=>$val)
{
  $rtn[$key]+=$val;
}

foreach ($array2 as $key=>$val)
{
  $rtn[$key]+=$val;
}

foreach ($array2 as $key=>$val)
{
  $rtn[$key]+=$val;
}

以上将分配文件名，SUM（VAL）作为关联数组 $ RTN

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