3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'a,b,c(a,b,c),d(a,b(a,b)),e'; $temp = preg_split('/(\w)/', $str); print_r($temp);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Array ( [0] => [1] => , [2] => , [3] => ( [4] => , [5] => , [6] => ), [7] => ( [8] => , [9] => ( [10] => , [11] => )), [12] => )

preferences:
265.85 ms | 406 KiB | 369 Q