Can I run 2 apaches on the same port?

Hi,

I want to run both php4 and php5 on my server. Is this posible without having to use 2 different ports?

I have 2 apache setup at the moment but they can't bind both with port 80 at the same time. Which is no surprise actualy. But is there a way to force this?

You can, but you may have problems unless you set up correct pathing for each apache server to find the version you want.

Correct,

NO,you can only have 1 server per port. Try putting the 2nd server on 8080, the acceptable alt to port 80

Might it be possible to play with the association?

for example, all *.php5 requests are parsed by the PHP5 engine, and the *.php requests are parsed by the PHP4 engine?

Although having both on the same server will likely cause conflicts... I do believe that operating two versions of Apache on seperate ports is your best solution.

Ok, and what about the following

Bind apache_php4 to port 80 and apache_php5 to another port (let's say 8080)

Is ther a way apache_php4 can forward all php5 files to the other apache server.
See this like a cluster of 2 apaches with loadbalancing. Only loadbalancing is based on the file extension or the .htaccess file.

Yes but I can't expect every visitor of the sites on my server to know which port to use.

Is there a reason why you need PHP4 and PHP5 working simultaneously?

Does [most] old PHP4 code not work in PHP5?

I had the understanding that old code would generally work... with the exception of some new reserved words.

Yes there is. The most important script on myserver (cpanel/whm) doen't work with php5.

Anyone knows how I can send a web requist to an other apache server in apache?
If I can let my first apache server ask an other apache server to handle/parse this file for him, the problem would be solved