3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php mkdir('1');
Output for 5.2.3 - 7.1.0
Warning: mkdir(): Permission denied in /in/Bvc4A on line 2
Output for 5.0.0 - 5.2.2
Warning: mkdir(): Read-only file system in /in/Bvc4A on line 2
Output for 4.3.2 - 4.4.9
Warning: mkdir(1): Read-only file system in /in/Bvc4A on line 2
Output for 4.3.0 - 4.3.1
Warning: mkdir(1) [http://www.php.net/function.mkdir]: Read-only file system in /in/Bvc4A on line 2