3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(JSON_UNESCAPED_UNICODE);
Output for 5.4.0 - 5.6.30, hhvm-3.10.1 - 3.11.1, hhvm-3.13.2 - 3.15.4, 7.0.0 - 7.2.0
int(256)
Output for hhvm-3.12.14, hhvm-3.17.3

Process exited with code 137.
Output for 4.3.0 - 5.3.29
Notice: Use of undefined constant JSON_UNESCAPED_UNICODE - assumed 'JSON_UNESCAPED_UNICODE' in /in/XiPvL on line 3 string(22) "JSON_UNESCAPED_UNICODE"