string(90) "Error=Deprecated endpoint, see https://firebase.google.com/docs/cloud-messaging/migrate-v1"
array(2) {
  [0]=>
  string(58) "Authorization: key=AIzaSyB30lrYCp1FLrXvdQUQryTZ_dUUTxALsXc"
  [1]=>
  string(30) "Content-Type: application/json"
}
array(3) {
  ["registration_ids"]=>
  array(1) {
    [0]=>
    string(152) "eCJdEreorfI:APA91bFklHYNqiwM5LZ6wOVdYUGt6_lRpJIlJOybsSoVAYkJuhYWoK9dzMentPqSExSy773lPCCIXHjaC2Gx1DMHMF6sND8k9kDyEQ3-pEvdzTp12IeouYKML1vYLjxo3XIDg2A6NTkw"
  }
  ["collapse_key"]=>
  string(10) "1726804312"
  ["data"]=>
  array(1) {
    ["message"]=>
    array(6) {
      ["Type"]=>
      string(1) "0"
      ["action-loc-key"]=>
      string(4) "Open"
      ["body"]=>
      string(13) "hi from vinay"
      ["ID"]=>
      string(3) "123"
      ["Keyword"]=>
      NULL
      ["Metro"]=>
      string(2) "52"
    }
  }
}
<br><br>ArrayNULL