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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 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
Array ( [0] => Array ( [0] => a [1] => b ) [1] => Array ( [0] => c [1] => d ) )