3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function foo($a = 'asdf', $b = '') { var_dump($a); var_dump($b); } foo(); foo(NULL, 'qwer');
based on dT0dB
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(4) "asdf" string(0) "" NULL string(4) "qwer"