3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php error_reporting(-1); function myCheckA($in) { return isset($in); } function myCheck($in) { global $$in; return !is_null($$in); } $var1='Something'; $var2='var1'; echo 'Set: ' . isset($$var2), "\n"; $var2='nope'; echo 'Set: ' . isset($$var2), "\n"; $var2='var1'; echo 'Set: ' . myCheck($var2), "\n"; $var2='nope'; echo 'Set: ' . myCheck($var2), "\n"; ?>
Output for 4.3.0 - 7.1.0
Set: 1 Set: Set: 1 Set: