3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = '23 234 xxx 55 666'; $matches = null; preg_match('/\\d+/',$s, $matches); var_dump($matches);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
array(1) { [0]=> string(2) "23" }
preferences:
158.7 ms | 404 KiB | 216 Q