3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function logMe($string) { global $foo; if (isset($foo)) { return $foo . $string; } } var_dump(logMe('string')); $foo = 'bar'; var_dump(logMe('string'));
Output for 4.3.0 - 7.2.0
NULL string(9) "barstring"