3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = "hello"; $b = "hi"; $val = "howdy"; $val = "a"; echo $$val; // outputs "hello" $val = "b"; echo $$val; // outputs "hi" echo $val; // outputs "howdy" echo ${"val"}; // also outputs "howdy"
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
hellohibb
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/ffVvT on line 14
Process exited with code 255.