リストをn個ずつのサブリストに分割 (PHP)
前回はPythonでしたが、PHPの場合はもちろんそのものずばりの関数が用意されています。
15個の要素を3つずつに分割。
$ php -r 'print_r(array_chunk(range(0, 14), 3));' Array ( [0] => Array ( [0] => 0 [1] => 1 [2] => 2 ) [1] => Array ( [0] => 3 [1] => 4 [2] => 5 ) [2] => Array ( [0] => 6 [1] => 7 [2] => 8 ) [3] => Array ( [0] => 9 [1] => 10 [2] => 11 ) [4] => Array ( [0] => 12 [1] => 13 [2] => 14 ) )
もちろん余りもちゃんとケアしてくれます。
php -r 'print_r(array_chunk(range(0, 10), 3));' Array ( [0] => Array ( [0] => 0 [1] => 1 [2] => 2 ) [1] => Array ( [0] => 3 [1] => 4 [2] => 5 ) [2] => Array ( [0] => 6 [1] => 7 [2] => 8 ) [3] => Array ( [0] => 9 [1] => 10 ) )