where is the libphp4.so?

I want to install a server using apache2, mysql and php4 in the linux 7.3.
And I have follow the documentation in the php.net
But in the latest step, I can not find the libphp4.so file in the modules file
http://www.php.net/manual/en/install.apache2.php
would sombody help me?

Andreas Paasch <Andreas@Paasch.Net> wrote in message news:<5MUNa.12068$Kb2.532446@news010.worldonline.d k>...
> tommy wrote:
>
> > I want to install a server using apache2, mysql and php4 in the linux 7.3.
> > And I have follow the documentation in the php.net
> > But in the latest step, I can not find the libphp4.so file in the modules
> > file http://www.php.net/manual/en/install.apache2.php
> > would sombody help me?
>
> www.rpmfind.net should help you finding that module.
> But basically you should have it, so you need to find it on your system.
> find or slocate to find it.
>
> HTH,
>
> /Andreas

Thank you for your help~^^
And i want to ask a question that after I have found that module
and add lines in the http-conf file to load the moudule.
When I type in /usr/local/apache2/bin/apachectl start
The following error massage occurs:
Syntax error on line 232 of /usr/local/apache2/conf/httpd.conf:
Cannot load /usr/local/apache2/modules/libphp4.so into server:
/usr/local/apache2/modules/libphp4.so:undefined symbol:
ap_block_alarms
what is this error?