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run code in 150+ php & hhvm versions
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<?php $user = "user1"; $password = "password"; $users = array(); $users[$user] = $password; print_r($users);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [user1] => password )