从三个平面数组创建关联数组

Question

考虑以下因素：

    $a = array('Q1', 'Q2', 'Q3', 'Q4');
    $b = array('2014' => '101', '2014' => '102', '2014' => '103', '2014' => '104');
    $c = array('2015' => '101', '2015' => '102', '2015' => '103', '2015' => '104');

如何将这 3 个数组转换成一个这样的数组：

    array(
        'Q1' => array(
            '2014' => '101',
            '2015' => '101'
        ),
        'Q2' => array(
            '2014' => '102',
            '2015' => '102'
        ),
        'Q3' => array(
            '2014' => '103',
            '2015' => '103'
        ),
        'Q4' => array(
            '2014' => '104',
            '2015' => '104'
        )
    );

我无法以一种可以使用 array_combine 和 $a 的方式正确合并 $b 和 $c，以保持上述所需的结构。

抱歉 array() 整个代码，我正在处理旧版应用程序。

Answer 1

这应该有效

<?php
    $d = array();
    for($i=0; $i<count($a), $++){
        $d[$a[$i]][] = $b[$i];
        $d[$a[$i]][] = $c[$i];
    }
    print_r($d)
?>

Answer 2

首先，您有重复的数组键，在这种情况下，最后一个键将覆盖前面的键。在这里，任意假设键具有唯一的后缀，以便于您想要的合并。

<?php

    $a = array('Q1', 'Q2', 'Q3', 'Q4');
    $b = array('2014' => '101', '2014_2' => '102', '2014_3' => '103', '2014_4' => '104');
    $c = array('2015' => '101', '2015_2' => '102', '2015_3' => '103', '2015_4' => '104');

    function mergeArraysAssociative($arrKeys, $array1, $array2) {
        $merged = array();
        foreach ($arrKeys as $key => $val) {
            $arrKeys1   = array_keys($array1);
            $arrKeys2   = array_keys($array2);

            $arrValues1 = array_values($array1);
            $arrValues2 = array_values($array2);

            $merged[$val][$arrKeys1[$key]] = $arrValues1[$key];
            $merged[$val][$arrKeys2[$key]] = $arrValues2[$key];

        }

        return $merged;
    }

    var_dump(mergeArraysAssociative($a, $b, $c));

?>

The var_dump() above produces something similar to what is shown below. And, you can quick test it here.

array (size=4)
  'Q1' => 
    array (size=2)
      2014 => string '101' (length=3)
      2015 => string '101' (length=3)
  'Q2' => 
    array (size=2)
      '2014_2' => string '102' (length=3)
      '2015_2' => string '102' (length=3)
  'Q3' => 
    array (size=2)
      '2014_3' => string '103' (length=3)
      '2015_3' => string '103' (length=3)
  'Q4' => 
    array (size=2)
      '2014_4' => string '104' (length=3)
      '2015_4' => string '104' (length=3)

从三个平面数组创建关联数组

Create associative array from three flat arrays

php

arrays

associative-array

multidimensional-array