HOWTO remove device tokens received by Apple APNS feedback

Question

I am successfully fetching Apple APNS feedback data via PHP. The structure that I am getting (after some processing) looks something like this:

timestamp

device

Answer 1

A timestamp (as a four-byte time_t value) indicating when APNs determined that the app no longer exists on the device. This value, which is in network order, represents the seconds since 12:00 midnight on January 1, 1970 UTC.

you can compare it with your table's last insert time and then remove the invalid token from db, In my case i am using mysql and php for sever side

$sql="SELECT insert_time from device_tokens ORDER BY insert_time DESC LIMIT 1";

it will return last updated time from db and then i just convert it into epoch timestamp by using

$sql1="SELECT UNIX_TIMESTAMP(' $timestamp')";

and finally i just compare it with apns feedback timestamp like this

if($inactive_Timestamp>$dbTime_stamp)
  {
foreach ($apnsfeedback_tokens as $key => $value) {
  # code...

  $inactive_Token=$value['devtoken'];

 $sql= "DELETE FROM device_tokens WHERE device_token='$inactive_Token'";


if ($conn->query($sql) === TRUE) {
    echo "Record deleted successfully";
} else {
    echo "Error deleting record: " . $conn->error;
}