3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = '1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,28,29,30,31,32,33,34,35,36,37,38,39,41,45,47,71,73,75,76,77,78,80,81,83,87,88,89,90'; $list = explode(',', $str); array_push($list, 91); $list_new = array_unique($list); var_export($list_new);

preferences:
34.94 ms | 402 KiB | 5 Q