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@ 2016-01-12T16:18:12Z

<?php

 $array = [
        8 => [
                'Blue',
                'Red',
                'Pink'
        ],
        2 => [
                'S',
                'M'
        ]
];

    $combinations = [[]];
    $comKeys = array_keys($data);


    for ($count = 0; $count < count($comKeys); $count++) {
        $tmp = [];
        foreach ($combinations as $v1) {
            foreach ($array[$comKeys[$count]] as $v2)
                $tmp[] = $v1 + [$comKeys[$count] => $v2];

        }
        $combinations = $tmp;
    }

    print_r($combinations);

Output
Performance
VLD
References
Branches

print_r: documentation ( source)
array_keys: documentation ( source)

preferences:dark modelive preview

52.89 ms | 402 KiB | 5 Q