3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $a = 'a'; echo isset($a['b']); var_dump($a['b']);
Output for 5.4.0 - 5.6.28, 7.0.0 - 7.1.0
Warning: Illegal string offset 'b' in /in/as4CM on line 4 string(1) "a"
Output for 5.0.0 - 5.0.2, hhvm-3.10.0 - 3.13.2
string(1) "a"
Output for 4.3.0 - 4.4.9, 5.0.3 - 5.3.29
1string(1) "a"