3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $subject = '{"_id":"scheme_version","_rev":"4-cad1842a7646b4497066e09c3788e724","scheme_version":1234}'; $pattern = '(?<=scheme_version":)[0-9]+'; echo preg_grep($pattern, array($subject));
Output for 4.3.11 - 7.2.0
Warning: preg_grep(): Unknown modifier '[' in /in/Jvvt1 on line 4
Output for 4.3.0 - 4.3.10
Warning: Unknown modifier '[' in /in/Jvvt1 on line 4