datetime - PHP Function To Detect Expired Webhooks

I've been using the function below to test for expired webhooks (older than 10 minutes) and it's been working until today.

    public function isWebhookExpired($eventTime){

        $status = TRUE;
        $serverTimezone = new DateTimeZone('America/Chicago');
        $webhookTimezone = new DateTimeZone('GMT');
 
        $adjustedEventTime = new DateTime($eventTime, $webhookTimezone);

        $timeOffset = $serverTimezone->getOffset($adjustedEventTime) - 600;

        $currentTime = strtotime("$timeOffset seconds");

        if ($currentTime > strtotime($eventTime)) {
            error_log('An expired webhook detected.');
        }else{
            $status = FALSE;
        }

        return $status;
    }
Copy code

Starting today I've been getting the error

PHP Fatal error:  Uncaught Exception: DateTime::__construct(): Failed to parse time string (2021-02-01T20:42:09.567506804Z) at position 0 (2): The timezone could not be found in the database
Copy code

As far as I can tell the timestamp format has not changed -- 2021-02-01T20:42:09.567506804Z

I did recently update from php 7.2 to 7.4 but the function worked after the update until today.

I'd appreciate any input on how to resolve the error, reformat the timestamp, or a new function that accomplishes the same task.

Didn't find the answer?

Our community is visited by hundreds of web development professionals every day. Ask your question and get a quick answer for free.