3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(JSON_UNESCAPED_SLASHES);
Output for 5.4.0 - 7.2.0
int(64)
Output for 4.3.0 - 5.3.29
Notice: Use of undefined constant JSON_UNESCAPED_SLASHES - assumed 'JSON_UNESCAPED_SLASHES' in /in/3oqcB on line 3 string(22) "JSON_UNESCAPED_SLASHES"