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run code in 150+ php & hhvm versions
Bugs & Features
<?php define('NULL', 'YOLO'); var_dump(NULL);
Output for 5.1.3 - 5.6.28, 7.0.0 - 7.1.0
NULL
Output for hhvm-3.10.0 - 3.12.0
Notice: Constant NULL already defined in /in/Jnlnc on line 3 NULL
Output for 4.3.0 - 5.1.2
string(4) "YOLO"