3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function foo() { $foo = ''; function bar() { global $foo; var_dump($foo); } var_dump($foo); } var_dump($foo);
Output for 5.0.4 - 7.2.0
Notice: Undefined variable: foo in /in/L6oI5 on line 10 NULL
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: foo in /in/L6oI5 on line 10 NULL