Iterator, returning the cartesian product of associative array of iterators. See https://en.wikipedia.org/wiki/Cartesian_product .
- https://github.com/phpbench/phpbench/blob/master/lib/Benchmark/CartesianParameterIterator.php : A little bit more messy.
- https://github.com/bpolaszek/cartesian-product : Not so laconic - but covered by tests.
- https://stackoverflow.com/a/15973172 : Pretty simple though no iterator, plain array-stuff.
https://github.com/PatchRanger/php-cartesian-benchmark
<?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);
Result:
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
)
)