3v4l.org

run code in 300+ PHP versions simultaneously
<?php $pattern = "hello[/name/hello[/second]][/bye]"; if (preg_match_all('/\[((?:[^\[\]]*|(?R))*)\]/', $pattern, $matches)) { print_r($matches); }
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => Array ( [0] => [/name/hello[/second]] [1] => [/bye] ) [1] => Array ( [0] => /name/hello[/second] [1] => /bye ) )

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:
78.93 ms | 405 KiB | 5 Q