3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "<tag>i dont know what is here</tag> don't remove this text"; $string = preg_replace('|^<([a-z]*).*|', '<$1></$1>', $string); echo $string; // <tag></tag>
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.26, 8.1.0 - 8.1.13
<tag></tag>

preferences:
37.26 ms | 409 KiB | 5 Q