What considerations should be taken into account when deciding whether to use suphp with PHP4 or PHP5?

When deciding whether to use suphp with PHP4 or PHP5, it is important to consider the compatibility of your existing codebase with each PHP version, as well as the availability of support and security updates for each version. Additionally, consider the performance implications of running PHP4 or PHP5 with suphp, as well as any specific features or requirements of your application that may be better supported by one version over the other.

// Example code snippet for using suphp with PHP5
<IfModule mod_suphp.c>
    AddHandler application/x-httpd-php5 .php
    suPHP_AddHandler application/x-httpd-php5
</IfModule>