3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php function setifexists(&$var, $default = null) { if (!isset($var)) { $var = $default; } } setifexists($nonsense, true); var_dump($nonsense); $me = false; setifexists($me, true); var_dump($me);
based on n6t6n
Output for 4.3.0 - 7.2.0
bool(true) bool(false)