NEED PHP4 AND PHP5 ON THE SAME WEBSERVER?

If your answer YES,  PLEASE GO AHEAD,

You can simply enable both PHP 4 and PHP 5 in WHM > EasyApache (Apache Update) or using /scripts/easyapache in command line, 

then PHP shouldn't be down at all during the recompile. I really suggest using WHM because at the end you'll have the option to select

the default PHP version, if you choose the PHP 5 as the default version, new domains created in the server will use PHP5 by default.

Then suppose one domain is need to have php4,  its verys easy,

At that point, PHP 4 will be available but not the default. You'll need people to add the following to their .htaccess file to switch PHP 4 to their default if they prefer:

Code:

AddType application/x-httpd-php4 .php .phtml

This would allow them to use .php files as PHP 4 in their own account.

Otherwise, they can simply name the pages .php4 and they will use PHP 4 without the above line in .htaccess.