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run code in 200+ php & hhvm versions
Bugs & Features
<?php $b = is_array(null); echo b;
Output for 7.2.0
Warning: Use of undefined constant b - assumed 'b' (this will throw an Error in a future version of PHP) in /in/08AfN on line 4 b
Output for 4.3.0 - 7.1.10
Notice: Use of undefined constant b - assumed 'b' in /in/08AfN on line 4 b