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run code in 200+ php & hhvm versions
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<?php $data = array( "to" => "cMbucIFcJMA:APA91bH_..... ", "notification" => array( "body" => "sadeq", "title" => "test notification" ) ); echo json_encode($data);
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
{"to":"cMbucIFcJMA:APA91bH_..... ","notification":{"body":"sadeq","title":"test notification"}}