about upgrade php to 8+

kebindong

Hi, Im new to Linux. I have a question about upgrading my current php7.4.3 to Php8 or 8.1.
cause my site (flarum 1.5.0 Apache2) have an error when sign up, when turn debug on, it shows Internal error 500, POST www.mysite.com/register. And, I searched and tried many ways to fix, but it still cannot fix. I think I have to upgrade my php. However, for me, im new for this, im worried about if I had any errors again after I did upgrade.
I have 2 questions,
Can I use this (https://www.cloudbooklet.com/how-to-upgrade-php-version-to-php-8-0-on-ubuntu/ ) for references ?
After upgraded, do I need to configure php.ini for new php version.
Thanks

SKevo

kebindong my site (flarum 1.5.0 Apache2) have an error when sign up, when turn debug on, it shows Internal error 500, POST www.mysite.com/register

Are there any logs under yourflarumdir/storage/logs? You may use the troubleshooting docs for useful tips on how to debug Flarum errors, if you haven't already.

kebindong I think I have to upgrade my php.

You probably won't have to do that. I think that you should focus on what causes the error first, through the log files (as I have mentioned above).

kebindong Can I use this (https://www.cloudbooklet.com/how-to-upgrade-php-version-to-php-8-0-on-ubuntu/ ) for references ?

I think yes, it seems okay to me

kebindong After upgraded, do I need to configure php.ini for new php version.

That's usually not needed, your old php.ini should stay unchanged and should still be valid, unless there were any breaking changes. But honestly, when FreeFlarum upgraded from 7.4 to 8.0.1, we haven't changed our configuration and we were good to go with the old values.

kebindong

SKevo thanks for help.