3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php putenv("TEST='PHP_SELF'"); $test = getenv("TEST"); echo $test; $test = getenv(PHP_SELF); echo $test;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
'PHP_SELF' Notice: Use of undefined constant PHP_SELF - assumed 'PHP_SELF' in /in/T36VG on line 5