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<?php $SQL = "test in uppercase"; $sql = "test in lowercase"; var_dump($SQL); var_dump($sql);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(17) "test in uppercase" string(17) "test in lowercase"