如何在PHP中生成具有不同元素编号的多个数组中的所有项目组合

Question

I'm trying to find all combinations of items in several arrays. The number of arrays is random (this can be 2, 3, 4, 5...). The number of elements in each array is random too...

For exemple, I have the 3 arrays :

$arrayA = array('A1','A2','A3',,'A4','A5','A6'); // (3 From here each time)

$arrayB = array('B1','B2','B3','B4','B5'); //(2 From here each time)

$arrayC = array('C1','C2'); // (1 From here each time)

I would like to generate an array Like :

A1+A3+A5, B1+B5, C1

A1+A4+A5, B1+B4, C1

....

I have tried like this but I need different elements number from array not ONE element from each array.

<?php

$color = array('Blue','Red','Black','Green');
$size = array('L','M','S','XL','XXL');
$type  = array('Half selevs','full seleves');
$options = [
            $color,
            $size,
            $type,
        ];
$combinations = getCombinations($options);

print_r($combinations);

function getCombinations($options){ 

            $combinations = [[]];

            for ($count = 0; $count < count($options); $count++) {
                $tmp = [];
                foreach ($combinations as $v1) {
                    foreach ($options[$count] as $v2)
                        $tmp[] = array_merge($v1, [$v2]);

                }
                $combinations = $tmp;
            }

            return $combinations;
        }
?>

Output:

Array ( [0] => Array ( [0] => Blue [1] => L [2] => Half selevs )

[1] => Array
    (
        [0] => Blue
        [1] => L
        [2] => full seleves
    )

[2] => Array
    (
        [0] => Blue
        [1] => M
        [2] => Half selevs
    )

[3] => Array
    (
        [0] => Blue
        [1] => M
        [2] => full seleves
    )

[4] => Array
    (
        [0] => Blue
        [1] => S
        [2] => Half selevs
    )

[5] => Array
    (
        [0] => Blue
        [1] => S
        [2] => full seleves
    )

[6] => Array
    (
        [0] => Blue
        [1] => XL
        [2] => Half selevs
    )

[7] => Array
    (
        [0] => Blue
        [1] => XL
        [2] => full seleves
    )

[8] => Array
    (
        [0] => Blue
        [1] => XXL
        [2] => Half selevs
    )

[9] => Array
    (
        [0] => Blue
        [1] => XXL
        [2] => full seleves
    )

[10] => Array
    (
        [0] => Red
        [1] => L
        [2] => Half selevs
    )

[11] => Array
    (
        [0] => Red
        [1] => L
        [2] => full seleves
    )

[12] => Array
    (
        [0] => Red
        [1] => M
        [2] => Half selevs
    )

[13] => Array
    (
        [0] => Red
        [1] => M
        [2] => full seleves
    )

[14] => Array
    (
        [0] => Red
        [1] => S
        [2] => Half selevs
    )

[15] => Array
    (
        [0] => Red
        [1] => S
        [2] => full seleves
    )

[16] => Array
    (
        [0] => Red
        [1] => XL
        [2] => Half selevs
    )

[17] => Array
    (
        [0] => Red
        [1] => XL
        [2] => full seleves
    )

[18] => Array
    (
        [0] => Red
        [1] => XXL
        [2] => Half selevs
    )

[19] => Array
    (
        [0] => Red
        [1] => XXL
        [2] => full seleves
    )

[20] => Array
    (
        [0] => Black
        [1] => L
        [2] => Half selevs
    )

[21] => Array
    (
        [0] => Black
        [1] => L
        [2] => full seleves
    )

[22] => Array
    (
        [0] => Black
        [1] => M
        [2] => Half selevs
    )

[23] => Array
    (
        [0] => Black
        [1] => M
        [2] => full seleves
    )

[24] => Array
    (
        [0] => Black
        [1] => S
        [2] => Half selevs
    )

[25] => Array
    (
        [0] => Black
        [1] => S
        [2] => full seleves
    )

[26] => Array
    (
        [0] => Black
        [1] => XL
        [2] => Half selevs
    )

[27] => Array
    (
        [0] => Black
        [1] => XL
        [2] => full seleves
    )

[28] => Array
    (
        [0] => Black
        [1] => XXL
        [2] => Half selevs
    )

[29] => Array
    (
        [0] => Black
        [1] => XXL
        [2] => full seleves
    )

[30] => Array
    (
        [0] => Green
        [1] => L
        [2] => Half selevs
    )

[31] => Array
    (
        [0] => Green
        [1] => L
        [2] => full seleves
    )

[32] => Array
    (
        [0] => Green
        [1] => M
        [2] => Half selevs
    )

[33] => Array
    (
        [0] => Green
        [1] => M
        [2] => full seleves
    )

[34] => Array
    (
        [0] => Green
        [1] => S
        [2] => Half selevs
    )

[35] => Array
    (
        [0] => Green
        [1] => S
        [2] => full seleves
    )

[36] => Array
    (
        [0] => Green
        [1] => XL
        [2] => Half selevs
    )

[37] => Array
    (
        [0] => Green
        [1] => XL
        [2] => full seleves
    )

[38] => Array
    (
        [0] => Green
        [1] => XXL
        [2] => Half selevs
    )

[39] => Array
    (
        [0] => Green
        [1] => XXL
        [2] => full seleves
    )

)

I want Like this:

Array ( [0] => Array ( [0] => Blue,Red,Green [1] => L,M [2] => Half selevs )

Answer 1

You could do something like this...

<?php
$variants = array();
$possible_letters = array('A','B','C');
$max_variant_number = 6;

foreach ($possible_letters as $possible_letter) {
 $min_variant_number = 0;
  while ($min_variant_number <= $max_variant_number) {
    $variants[] = $possible_letters.$min_variant_number;
    $min_variant_number++;
  }
}

This is just 2 loops that do some concatenation between an array and a consistently increasing number until the number has exhausted itself and then it moves to the next letter and resets that number. Beware it is a nested loop so Order of N squared will apply here you are into complexity theory.