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<?php $input_array = array('a', 'b', 'c', 'd'); $by_col = ceil(count($input_array) / 3); print_r(array_chunk($input_array, $by_col));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
Array ( [0] => Array ( [0] => a [1] => b ) [1] => Array ( [0] => c [1] => d ) )

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173.9 ms | 404 KiB | 204 Q