3v4l.org

run code in 300+ PHP versions simultaneously
<?php $subject = '{"_id":"scheme_version","_rev":"4-cad1842a7646b4497066e09c3788e724","scheme_version":1234}'; $pattern = '(?<=scheme_version":)[0-9]+'; echo preg_grep($pattern, array($subject));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: preg_grep(): Unknown modifier '[' in /in/Jvvt1 on line 4

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