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<?php $test = 'abc'; var_dump($test); //var_dump(isset($test['whatever']));
Output for 4.3.0 - 5.0.5, 5.1.1 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(3) "abc"
Output for 5.1.0
Fatal error: fatal flex scanner internal error--end of buffer missed in /in/PtBl7 on line 4
Process exited with code 255.