3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'hello,[how]. please don\'t remove[are]you?'; echo preg_replace('#\s*\[.+\]\s*#', ' ', $a); echo preg_replace('~\h*\[(?>[^][]++|(?R))*+]\h*~', ' ', $a);
Output for git.master, git.master_jit, rfc.property-hooks
hello, you?hello, . please don't remove you?

This tab shows result from various feature-branches currently under review by the php developers. Contact me to have additional branches featured.

Active branches

Archived branches

Once feature-branches are merged or declined, they are no longer available. Their functionality (when merged) can be viewed from the main output page

preferences:
39.84 ms | 401 KiB | 8 Q