"If you are maintaining or writing PHP scripts for several sites then you might be in a situation where you will have to use PHP3 code for one site and php4 code for another site. You could go four ways to solve this problem.

• Install mod_PHP4 and make sure that you will not use functions that are working only in PHP4.
• Write a shell script to change the apache conf. This can only be used on a development machine.
• Check the PHP version in every script.
• Install both modules on Apache and make them run simultaneously."

"You will have to get both PHP source packages from http://www.php.net. If you have an older php3 source tree then check the documentation to see if the configure script accepts the --enable-versioning option. You may want to get the latest Apache while you are at it. You can find it at http://www.apache.org"

Complete Story

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