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run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array(); var_dump(is_array($array['undefined']));
Output for 5.3.0 - 7.1.0
Notice: Undefined index: undefined in /in/cCr1M on line 5 bool(false)
Output for 4.3.0 - 5.2.17
Notice: Undefined index: undefined in /in/cCr1M on line 5 bool(false)