3v4l.org

run code in 500+ PHP versions simultaneously
<?php $matches = new stdClass; preg_match("((foo)+)", "foo", $matches); var_dump($matches);
Output for 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
array(2) { [0]=> string(3) "foo" [1]=> string(3) "foo" }
preferences:
105.08 ms | 1500 KiB | 4 Q