3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo 'bla'; ECHO 'blee'; ecHO 'ho,ho'; echo TRUE; echo true; echo trUE; echo PHP_OS; echo php_OS;
based on I0Muc
Output for 4.3.0 - 7.1.0
blableeho,ho111Linux Notice: Use of undefined constant php_OS - assumed 'php_OS' in /in/379Jj on line 9 php_OS