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From Frank Gingras <>
Subject Re: [users@httpd] PHP4/PHP5 both as Apache 2 Modules RHEL 5
Date Sat, 21 Feb 2009 00:23:23 GMT

You cannot run mod_php (v4) and mod_php (v5) simultaneously in the same 
httpd instance.

You're gonna have to run separate instances of httpd, and run a reverse 
proxy in front of them.


Lopez, Denise wrote:
> Hi all,
> I was wondering if anyone has successfully installed php4 and php5 both
> as Apache modules on RedHat Linux before.  My situation is that I have
> legacy authentication code that requires php4.  Sorry, not required, I
> just don't have the time to try to figure out how to modify the scripts
> to run under php5.  
> In addition we are moving to a new authentication method that requires
> PHP5. I would like to have the sites that run with the older version of
> php4 and the scripts that run with the newer version of php5 installed
> on the same server so the developers can move over authenticated
> applications as necessary.
> I currently have php5 installed as a module and php4 installed as a cgi
> binary but there is heavy use of the $_SESSION variables in the scripts
> and it does not function when php4 is configured as a cgi binary. I keep
> getting an undefined index error in the apache log that refers to a
> $_SESSION variable declared in one of the scripts.   
> My thought is it would be possible to have 2 virtual named hosts and one
> run php4 as a module and the other php5 as a module.
> Any input or point in the right direction would be appreciated.
> Thanks 
> Denise Lopez
> UCLA - Center for Digital Humanities
> Network Services
> Linux Systems Engineer
> 337 Charles E. Young Drive East
> PPB 1020
> Los Angeles, CA 90095-1499
> 310/206-8216
>  <<Picture (Device Independent Bitmap)>> 

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