Fatal error: Call to undefined function: spl_autoload_register()

[hoksi]

Hi all, I have installed roundcube 0.3-stable and get the following error message when using it via https (through a https portal, as the webserver is not configured for https):

https://secure.my-isp.com/www.my-domain.com/roundcube/

http://www.my-domain.com/roundcube/ works just fine, but when going through https I get the following error:

"Fatal error: Call to undefined function: spl_autoload_register() in /..../www/roundcube/program/include/iniset.php on line 107"

I have not had this problem with previous releases (0.1 or 0.2) of RoundCube.

Any suggestions for how to fix this is highly appreciated!

[hoksi]

It seems to be that the https portal runs php4 while the originating server runs php5. That explains the error message.