3v4l.org

run code in 300+ PHP versions simultaneously
<?php $matches = []; $a = preg_match('/([H])(?P<word>ello)/', "Hello", $matches); var_dump($matches);
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
array(4) { [0]=> string(5) "Hello" [1]=> string(1) "H" ["word"]=> string(4) "ello" [2]=> string(4) "ello" }
preferences:
75.28 ms | 407 KiB | 5 Q