3v4l.org

run code in 500+ PHP versions simultaneously
<?php preg_match('/(*MARK:A)a/', 'a', $matches); var_dump($matches);
Output for 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
array(2) { [0]=> string(1) "a" ["MARK"]=> string(1) "A" }
Output for 5.5.0 - 5.5.35
array(1) { [0]=> string(1) "a" }

preferences:
1239.5 ms | 1639 KiB | 4 Q