3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $foo = "bar"; print_r(array( $bar => "baz" ));
Output for 5.0.4 - 5.0.5, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: bar in /in/ktLWM on line 4 Array ( [] => baz )
Output for 5.1.0 - 5.6.28
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 )