To stay updated on the best upcoming PHP events and conferences for 2023, I recommend checking the following sources regularly:

1. PHP Conferences Website: Visit the official PHP conferences website (https://www.php.net/conferences/) to get the latest information on upcoming events. The PHP community often updates this page with details about conferences and events.

2. Social Media: Follow PHP communities, organizations, and event organizers on social media platforms such as Twitter, LinkedIn, and Facebook. These platforms are often used to announce and share information about upcoming events.

3. Eventbrite and Meetup: Platforms like Eventbrite and Meetup are great resources to discover local and international PHP events. Search for PHP-related keywords and filter by location to find events that match your interests.

4. PHP User Groups: Join local PHP user groups or online forums. Members of these communities often share information about upcoming events, conferences, and meetups.

5. Tech News Websites: Keep an eye on technology news websites and blogs for announcements about PHP conferences. Websites like SitePoint, PHPClasses, and others often cover industry events.

6. PHP-related Organizations: Check websites of PHP-related organizations and groups such as PHP-FIG (PHP Framework Interoperability Group) for announcements and updates on conferences.

Remember to verify the latest details and registration information directly from the official event websites. Additionally, due to the evolving nature of global events, consider checking for any changes or updates related to the format (physical or virtual) of the events.