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run code in 150+ php & hhvm versions
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<?php $response = 'response=Fail&responsecode=1&description=DUPLICATE_TRANSACTION'; parse_str($response, $response_array); print_r($response_array);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [response] => Fail [responsecode] => 1 [description] => DUPLICATE_TRANSACTION )