从多个数组获取所有排列PHP [英] Get all permutations from multiple arrays PHP

问题描述

我有以下数组

Array
(
   ['colour'] => Array
       (
             [0] => 1130
             [1] => 1131
             [2] => 1132
             [3] => 1133
       )

   ['size'] => Array
       (
             [0] => 1069
             [1] => 1070
       )
   //there could also be further arrays here such as weight etc

)

我想获取所有可能的排列-例如

I want to get all the possible permutations - such as

 Colour 1130 - Size 1069
 Colour 1130 - Size 1070
 Colour 1131 - Size 1069
 Colour 1131 - Size 1070
 Colour 1132 - Size 1069
 etc

但是很明显，不想让每种类型的排列都包含超过1个(项目不能同时是蓝色和红色，也不能是大中号)

But obviously don't want to have permutations that contain more than 1 of each type (an item cannot be both blue and red or both large and medium)

请注意，键都是数字，我在这里将其更改为颜色，大小以使其更清晰(希望如此！)

note, that the keys are all numeric, I changed them here to colour, size to make it clearer (hopefully!)

推荐答案

我从此答案，并给出您想要的输出.

I've taken the cartesian function from this answer, and given the output you've wanted.

(向 sergiy 信用以创建函数)

https://eval.in/199787

https://eval.in/199787

<?php

$array = Array
    (
    'colour' => Array
        (
        1130,
        1131,
        1132,
        1133
    ),
    'size' => Array
        (
        1069,
        1070
    )
);

echo "<pre>";
$arrFinalArray = cartesian($array);
foreach( $arrFinalArray as $arrIndie) {
    //We know each as 2 keys
    $arrKeys = array_keys($arrIndie);
    $arrValues = array_values($arrIndie);

    echo $arrKeys[0] ."  ". $arrValues[0] ." - ". $arrKeys[1] ." ". $arrValues[1] ."<br />";
}
echo "</pre>";


function cartesian($input) {
    // filter out empty values
    $input = array_filter($input);

    $result = array(array());

    foreach ($input as $key => $values) {
        $append = array();

        foreach($result as $product) {
            foreach($values as $item) {
                $product[$key] = $item;
                $append[] = $product;
            }
        }

        $result = $append;
    }

    return $result;
}

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