3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function test () { global $test_var; $test_var = 'Hello World!'; } echo $test_var;
based on aMsUe
Output for 5.0.4 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined variable: test_var in /in/33KCm on line 8
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: test_var in /in/33KCm on line 8