3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php if (defined(JSON_PRETTY_PRINT)) echo "yes";
Output for 5.4.0 - 7.1.0
Output for 4.3.0 - 5.3.29
Notice: Use of undefined constant JSON_PRETTY_PRINT - assumed 'JSON_PRETTY_PRINT' in /in/0naX8 on line 3