3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $attachments = array('a',2=>'b',3=>'c'); $id = current(array_flip($attachments)); echo $id;
Output for 4.3.0 - 5.0.4, 5.1.0 - 7.1.0
0
Output for 5.0.5
Fatal error: Only variables can be passed by reference in /in/ZnECb on line 3
Process exited with code 255.