Online PHP editor | refs for p6kPq

<?php $arr = [1,2,3,4,5,6,7,8,9,10,11,12]; function getIndexTranslator($list, $numColumns) { $numRows = ceil(count($list)/$numColumns); return function($x) use ($list, $numColumns, $numRows){ return ($x % $numColumns) * $numRows + floor($x / $numColumns); }; } $transformer = getIndexTranslator($arr, 4); for($x = 0; $x < count($arr); $x++){ echo $arr[$transformer($x)], $x % 4 == 3?"\n":" "; }