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<?php $arrayA = array('A1','A2','A3'); $arrayB = array('B1','B2','B3'); $arrayC = array('C1','C2'); print_r([...combinations([$arrayA, $arrayB, $arrayC])]); 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 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0
Array ( [0] => Array ( [0] => A1 [1] => B1 [2] => C1 ) [1] => Array ( [0] => A1 [1] => B1 [2] => C2 ) [2] => Array ( [0] => A1 [1] => B2 [2] => C1 ) [3] => Array ( [0] => A1 [1] => B2 [2] => C2 ) [4] => Array ( [0] => A1 [1] => B3 [2] => C1 ) [5] => Array ( [0] => A1 [1] => B3 [2] => C2 ) [6] => Array ( [0] => A2 [1] => B1 [2] => C1 ) [7] => Array ( [0] => A2 [1] => B1 [2] => C2 ) [8] => Array ( [0] => A2 [1] => B2 [2] => C1 ) [9] => Array ( [0] => A2 [1] => B2 [2] => C2 ) [10] => Array ( [0] => A2 [1] => B3 [2] => C1 ) [11] => Array ( [0] => A2 [1] => B3 [2] => C2 ) [12] => Array ( [0] => A3 [1] => B1 [2] => C1 ) [13] => Array ( [0] => A3 [1] => B1 [2] => C2 ) [14] => Array ( [0] => A3 [1] => B2 [2] => C1 ) [15] => Array ( [0] => A3 [1] => B2 [2] => C2 ) [16] => Array ( [0] => A3 [1] => B3 [2] => C1 ) [17] => Array ( [0] => A3 [1] => B3 [2] => C2 ) )
Output for 8.4.15
/bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.
Output for 5.6.15
Parse error: syntax error, unexpected '...' (T_ELLIPSIS), expecting ']' in /in/Y8clG on line 7
Process exited with code 255.
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127.17 ms | 410 KiB | 5 Q