README

迭代器，返回关联数组迭代器的笛卡尔积。参见 https://en.wikipedia.org/wiki/Cartesian_product 。

其他实现

https://github.com/phpbench/phpbench/blob/master/lib/Benchmark/CartesianParameterIterator.php ：稍微有些杂乱。
https://github.com/bpolaszek/cartesian-product ：虽然简洁，但经过测试。
https://stackoverflow.com/a/15973172 ：相当简单，虽然是数组而非迭代器。

基准测试

https://github.com/PatchRanger/php-cartesian-benchmark

快速开始

<?php

use PatchRanger\CartesianIterator;

require 'vendor/autoload.php';

$cartesianIterator = new CartesianIterator();
// The second argument controls the key of the corresponding value in the product array.
$cartesianIterator->attachIterator(new ArrayIterator([1,2]), 'test');
// No second argument means incremental numeration (indexed).
$cartesianIterator->attachIterator(new ArrayIterator(['foo', 'bar']));

$result = iterator_to_array($cartesianIterator, false);
print_r($result);

结果

Array
(
    [0] => Array
        (
            [test] => 1
            [1] => foo
        )

    [1] => Array
        (
            [test] => 2
            [1] => foo
        )

    [2] => Array
        (
            [test] => 1
            [1] => bar
        )

    [3] => Array
        (
            [test] => 2
            [1] => bar
        )

)

patchranger / cartesian-iterator

维护者

详细信息

README

其他实现

基准测试

快速开始