3v4l.org

run code in 300+ PHP versions simultaneously
<?php $m = []; preg_match('/feed_id=(\d+)/', 'https://www.only4kids.dk/index.php/gomage_feed/index/generate/?isAjax=true&feed_id=15&form_key=mPMJZ2mErWGfIvWP', $m);
Output for 5.6.38, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4

preferences:
153.13 ms | 403 KiB | 174 Q