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run code in 150+ php & hhvm versions
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<?php $location = new stdClass; $location->city = "Chicago"; $variableName = 'location->city'; //${$variableName} = 'Chicago'; var_dump("$location->city");
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(7) "Chicago"