Php4 vs PHP5

[Fabio Zottele]

Hi! I am using Apache2-prefork (Debian package) and php4 -DSO(Dabian 
package) on a Debian testing. I want to install mapserver4.6.1 from 
source code. I know I must re-compile php as a CGI, but I would also 
migrate from php4.4 to php5.
I read some old issues about php_mapscript.so and php5 in mailing list.
Is still impossible to compile php_mapscript against php5 or the php5 
support is still in developement stage?
Thank you in advance.
Fabio Zottele