Posted by NC on 07/09/07 19:52

On Jul 5, 1:17 am, Pugi! <pugin...@gmail.com> wrote:
>
> Is it possible to run PHP4 and PHP5 simultaneously
> on 1 webserver (LAMP) ?

Yes. GoDaddy does it on its Linux hosting service. Both interpreters
are configured as FastCGI executables. Which interpreter processes
*.php files is controlled by an AddHandler directive in a .htaccess
file, so PHP4 vs. PHP5 choice can be made on a per-directory basis if
necessary. The default is set in httpd.conf.

> I guess it is, but how and what are the pros and cons ?

Pros and cons FOR WHOM? For the server administrator, there are no
pros, only cons (each interpreter must be installed and configured;
two independent sets of extensions must be maintained; memory
requirements are somewhat higher as well). For hosting customers,
there are no cons (except slightly higher probability of server
overload), only pros (they can use applications that require both PHP4
and PHP5 on the same machine).

> Should one consider this safe for a production environment ?

If each installation in itself is secure, there is no reason to think
running both of them simultaneously would compromise security...

Cheers,
NC

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