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run code in 150+ php & hhvm versions
Bugs & Features
<?php $categoryId = 2; var_dump(($categoryId != null) && !$category);
Output for 5.0.4 - 7.1.0
Notice: Undefined variable: category in /in/trGDj on line 5 bool(true)
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: category in /in/trGDj on line 5 bool(true)