3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo 'heallo!';f ?>
Output for 7.2.0 - 7.2.6
heallo! Warning: Use of undefined constant f - assumed 'f' (this will throw an Error in a future version of PHP) in /in/fgMfr on line 2
Output for 7.0.0 - 7.1.20
heallo! Notice: Use of undefined constant f - assumed 'f' in /in/fgMfr on line 2
Output for 4.3.0 - 5.6.28
heallo! Notice: Use of undefined constant f - assumed 'f' in /in/fgMfr on line 3