3v4l.org

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<?php $master_array = array(1, 2, 3, 4, 5, 6); $n = 2; // This is the number of columns / arrays $pattern_array = array(); $meta_array = array(); for ($i=1, $z=2*$n; $i <= $n; ++$i) { $pattern_array[$i-1] = $i; $pattern_array[$z-$i] = $i; $meta_array[] = array(); } foreach ($master_array as $i => $element) { $pattern_index = $i % $z; $meta_index = $pattern_array[$pattern_index] - 1; $meta_array[$meta_index][] = $element; } print_r($pattern_array);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.29 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => 1 [3] => 1 [1] => 2 [2] => 2 )

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189.25 ms | 405 KiB | 344 Q