PHP Cartesian Function

Cartesian.php

<?php

$attributeValues = array(
    'color' => array('Red', 'White', 'Blue'),
    'size' => array(1, 2, 3, 4),
    'fabric' => array('Cloth', 'Silk')
);

class Cartesian
{
    public static function build($set)
    {
        if (!$set) {
            return array(array());
        }

        $subset = array_shift($set);
        $cartesianSubset = self::build($set);

        $result = array();
        foreach ($subset as $value) {
            foreach ($cartesianSubset as $p) {
                array_unshift($p, $value);
                $result[] = $p;
            }
        }

        return $result;        
    }
}

print_r(Cartesian::build($attributeValues));

👍

If i need a certain amount of data, what should i do?
suppose i need maximum 20 data instead of 24 from you above example, then what should i do?

There looks to be 24 combinations; for the universe to balanced 24 must be returned. If you do not want all of them you can slice off the ones you don't want. $array = array_slice($array, 0, 20); or $array = array_slice($array, 4, 24);.

btw @jwage

return CartesianProduct::build([
      $this->xmlProvider()[0],
      $this->validElementNameProvider()[0],
      $this->invalidElementNameProvider()[0]
]);

nice one.

Here's pretty interesting implementation https://github.com/PatchRanger/cartesian-iterator

Amazing. Thanks a Ton