3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $subject = '{"_id":"scheme_version","_rev":"4-cad1842a7646b4497066e09c3788e724","scheme_version":1234}'; $pattern = '(?<=scheme_version":)[0-9]+'; echo preg_grep($subject, $pattern);
Output for 5.2.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Warning: preg_grep() expects parameter 2 to be array, string given in /in/tDGpA on line 4
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.3.11 - 5.1.6
Warning: preg_grep(): Second argument to preg_grep() should be an array in /in/tDGpA on line 4
Output for 4.3.0 - 4.3.10
Warning: Second argument to preg_grep() should be an array in /in/tDGpA on line 4