Contrary to your response, the PHP site itself here... http://us2.php.net/mysql
says clearly that for PHP 5 on a Linux OS, PHP needs to be reconfigured before MySQL is supported:
MySQL is not enabled by default, nor is the MySQL library bundled with PHP. Read this FAQ for details on why. Use the --with-mysql[=DIR] configure option to include MySQL support. You can download headers and libraries from » MySQL.
Are you wrong? Are they wrong? Am I missing something? Everything still seems to point to the need to reconfigure with the MySQL optin turned on. I just don't have an answer yet. Maybe I need to ask on another forum?