3v4l.org

run code in 500+ PHP versions simultaneously
<?php function check_link($link) { if(preg_match("#(?<=v=)[a-zA-Z0-9-]+(?=&)|(?<=v\/)[^&\n]+(?=\?)|(?<=v=)[^&\n]+|(?<=youtu.be/)[^&\n]+#", $link, $r)) { $pattern = '#<a\s?href="(https?:\/\/(?:www.)?[\w.\#\/?=]+)">\1<\/a>#is'; return preg_replace($pattern,'<iframe width="560" height="315" src="https://www.youtube.com/embed/'.$r[0].'" frameborder="0"></iframe>',$link); } } echo check_link('<a href="https://www.youtube.com/watch?v=Z7Oc8QaM5VU">https://www.youtube.com/watch?v=Z7Oc8QaM5VU</a>');
Output for 5.6.38, 7.0.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
<iframe width="560" height="315" src="https://www.youtube.com/embed/Z7Oc8QaM5VU">https://www.youtube.com/watch?v=Z7Oc8QaM5VU</a>" frameborder="0"></iframe>
preferences:
107.76 ms | 1506 KiB | 4 Q