3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $foo = "bar"; print_r(array( $bar => "baz" ));
Output for 5.0.4 - 5.0.5, hhvm-3.10.1 - 3.15.4, hhvm-3.18.4 - 3.21.3, 7.0.0 - 7.2.11
Notice: Undefined variable: bar in /in/ktLWM on line 4 Array ( [] => baz )
Output for hhvm-3.17.3, hhvm-3.22.0
Notice: Undefined variable: bar in /in/ktLWM on line -1 Array ( [] => baz )
Output for 5.1.0 - 5.6.38
Notice: Undefined variable: bar in /in/ktLWM on line 5 Array ( [] => baz )
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: bar in /in/ktLWM on line 4 Array ( [] => baz )