3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $name = 'this'; $$name = 'text'; // sets $this to 'text' echo 33;
Output for 7.1.0 - 7.2.0
Fatal error: Uncaught Error: Cannot re-assign $this in /in/X8Hv4:3 Stack trace: #0 {main} thrown in /in/X8Hv4 on line 3
Process exited with code 255.
Output for 4.3.0 - 5.6.30, hhvm-3.10.1 - 3.17.3, 7.0.0 - 7.0.20
33