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<?php $atrs_ref = ['p', 'm', 'g']; $colors=['blanco', 'negro', 'rojo']; $sizes=['corta', 'larga'] ; print_r([...combinations([$atrs_ref, $colors, $sizes,])]); function combinations(array $arrays): iterable { if ($arrays === []) { yield []; return; } $head = array_shift($arrays); foreach ($head as $elem) { foreach (combinations($arrays) as $combination) { yield [$elem, ...$combination]; } } }
Output for git.master_jit, git.master
Array ( [0] => Array ( [0] => p [1] => blanco [2] => corta ) [1] => Array ( [0] => p [1] => blanco [2] => larga ) [2] => Array ( [0] => p [1] => negro [2] => corta ) [3] => Array ( [0] => p [1] => negro [2] => larga ) [4] => Array ( [0] => p [1] => rojo [2] => corta ) [5] => Array ( [0] => p [1] => rojo [2] => larga ) [6] => Array ( [0] => m [1] => blanco [2] => corta ) [7] => Array ( [0] => m [1] => blanco [2] => larga ) [8] => Array ( [0] => m [1] => negro [2] => corta ) [9] => Array ( [0] => m [1] => negro [2] => larga ) [10] => Array ( [0] => m [1] => rojo [2] => corta ) [11] => Array ( [0] => m [1] => rojo [2] => larga ) [12] => Array ( [0] => g [1] => blanco [2] => corta ) [13] => Array ( [0] => g [1] => blanco [2] => larga ) [14] => Array ( [0] => g [1] => negro [2] => corta ) [15] => Array ( [0] => g [1] => negro [2] => larga ) [16] => Array ( [0] => g [1] => rojo [2] => corta ) [17] => Array ( [0] => g [1] => rojo [2] => larga ) )

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