3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo htmlentities(chr(127).chr(127), ENT_COMPAT | ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
Output for 5.4.0 - 7.2.0

Output for 4.3.2 - 5.3.29
Notice: Use of undefined constant ENT_SUBSTITUTE - assumed 'ENT_SUBSTITUTE' in /in/NI6f2 on line 1 
Output for 4.3.0 - 4.3.1
Notice: Use of undefined constant ENT_SUBSTITUTE - assumed 'ENT_SUBSTITUTE' in /in/NI6f2 on line 1
Process exited with code 139.