3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo __DIR__."\n"; if (!defined('__DIR__')) { echo 'ok'."\n"; define('__DIR__', dirname(__FILE__)); } else { echo 'nok'."\n"; } echo __DIR__;
based on q89An
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
/in ok /in
Output for 4.3.0 - 5.2.17
Notice: Use of undefined constant __DIR__ - assumed '__DIR__' in /in/2k5mm on line 3 __DIR__ ok /in