advforecast2.php V4.02 and below no longer work as the NWS switched to HTTPS access to weather.gov, and the old script couldn’t use HTTPS.
advforecast2.php V4.03 replaced the fetchUrlWithoutHanging() routine with curl and so works. V5.05 (JSON) uses the still ‘experimental’ api.weather.gov forecasts, and they are problematic from time to time. The NWS has said that later this year, they’ll switch the weather.gov site to use the api-driven one, then the V4.03 script will fail to work and V5.05+ will be required.