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run code in 200+ php & hhvm versions
Bugs & Features
<?php $a = apple; $a = null; //$b never set echo (int) isset($a); echo (int) isset($b); unset($a); echo (int) isset($a);
Output for 7.2.0
Warning: Use of undefined constant apple - assumed 'apple' (this will throw an Error in a future version of PHP) in /in/FZm7s on line 2 000
Output for 4.3.0 - 7.1.7
Notice: Use of undefined constant apple - assumed 'apple' in /in/FZm7s on line 2 000