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run code in 150+ php & hhvm versions
Bugs & Features
<?php // Everything you enter here will be executed by our servers. Try it! $data = array( array('a', 'b', 'c', 'd', 'e'), array('f', 'g', 'h', 'i', 'j'), array('k', 'l', 'm', 'n', 'o'), array('p', 'q', 'r') ); $width = count($data[0]); // 5 $height = count($data); // 4 $total = $width * $height; // 20 $new_data = array(); for($i = 0; $i < $total; $i++) { $old_x = ceil($i / $width); // integer division $old_y = $i % $width; // modulo $new_x = $i % $height; // modulo $new_y = floor($i / $height); // integer division if (!isset($new_data[$new_x])) { $new_data[$new_x] = array(); } if (isset($data[$old_x][$old_y])) { $new_data[$new_x][$new_y] = $data[$old_x][$old_y]; } } print_r($new_data);
Output for 4.3.0 - 7.1.0
Array ( [0] => Array ( [0] => a [1] => j [2] => n [3] => r ) [1] => Array ( [0] => g [1] => f [2] => o ) [2] => Array ( [0] => h [1] => l [2] => k ) [3] => Array ( [0] => i [1] => m [2] => q [3] => p ) )