3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $d = 'ώ'; preg_match('/./u', $data, $matches); var_dump($matches);
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: data in /in/9KYm0 on line 3 array(0) { }
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: data in /in/9KYm0 on line 3 array(0) { }