Hi there, this is just a question about a possible "don't do it" with PHP 8.5. We are running an ISPConfig installation on Ubuntu 24.04.3 LTS with ISPConfig 3.3.0p3. We consider the installation well maintained. At some point we have previously added additional PHP versions following the HowTo https://www.howtoforge.com/ispconfig-php-ubuntu/ So far everything is working fine. We would want to add PHP 8.5 for some of the hosted sites (which is not yet part of the tutorial). Basically we would do it the same way as other versions. Of course, we would still set the default back to PHP 8.3 after the installation with upgrade-alternatives. The only question we have now is whether there are any known problems or some "please don't do it" cries with PHP 8.5. This is just to play it safe, no other reason. Best regards
The general recommendation is to use the default PHP version of the OS. Other versions are not supported and not tested. So there can be anything from no problem to complete failure. And we will test PHP 8.5 when the first Distribution will use it as the default, I guess this will probably be Ubuntu 26.04.
Change to 8.5 when following steps for 8.4 in additional php setup https://www.howtoforge.com/ispconfig-php-ubuntu/#php--11.
not had any problems with running php8.5 as an additional php version on ispconfig. obviously make sure the default php remains that which the OS expects. wordpress seems to be ok with it, obviously some plugins are not fully compliant yet and may cause issues, but if you run across any incompatible plugins you can either edit the plugin code to fix the incompatibility or set that site back to 8.4 (or earlier)
ISPConfig auto installer should cover default php just fine as it won't change most of the time, especially after setting it to OS default for ISPConfig server, but I always use my shared script with monit as an extra, just in case php update change it unknowingly.
