3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php namespace foo; define (__NAMESPACE__ . '\NULL', 10, true); // produces notice - Constant null already defined echo NULL;
Output for 7.3.0 - 7.3.1
Deprecated: define(): Declaration of case-insensitive constants is deprecated in /in/l5ZbU on line 4
Output for 7.0.0 - 7.2.13
Output for hhvm-3.22.0
Warning: Case insensitive constant names are not supported in HipHop in /in/l5ZbU on line -1
Output for hhvm-3.10.1 - 3.21.3
Warning: Case insensitive constant names are not supported in HipHop in /in/l5ZbU on line 4
Output for 5.3.20 - 5.6.38
10