3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php array_push ('blah');
Output for 5.6.0 - 5.6.30, 7.0.0 - 7.1.6
Fatal error: Only variables can be passed by reference in /in/vqj64 on line 3
Process exited with code 255.
Output for hhvm-3.15.4
Fatal error: Uncaught Error: Cannot pass parameter 1 by reference in /in/vqj64:3 Stack trace: #0 {main}
Process exited with code 255.