3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo "ok"; echo __DIR__."\n"; if (!defined('__DIR__')) { echo 'ok'."\n"; define('__DIR__', dirname(__FILE__)); } else { echo 'nok'."\n"; } echo __DIR__;
based on 2k5mm
Output for 5.3.0 - 7.2.0
ok/in ok /in
Output for 4.3.0 - 5.2.17
ok Notice: Use of undefined constant __DIR__ - assumed '__DIR__' in /in/pvnEW on line 4 __DIR__ ok /in