3v4l.org

run code in 300+ PHP versions simultaneously
<?php $pattern = '~ \\\\ . (*SKIP)(*F) | \$ ~xs';
Output for 8.2.28 - 8.2.29, 8.3.5 - 8.3.25, 8.4.4 - 8.4.12
preferences:
46.41 ms | 406 KiB | 5 Q