3v4l.org

run code in 300+ PHP versions simultaneously
<?php error_reporting(-1); function myCheck($in) { return @isset($in); } $var1='Something'; $var2='var1'; echo 'Set:' . isset($$var2); $var2='nope'; echo 'Set:' . isset($$var2); $var2='var1'; echo 'Set:' . myCheck($$var2); $var2='nope'; echo 'Set:' . myCheck($$var2); ?>

This is an error 500

Value for `_results` contains invalid data `array`


preferences:
169.95 ms | 2668 KiB | 11 Q