Skip the last two move lines. There's no php.conf.rpmnew. Restart Apache and all is well. If you don't you won't have MySQL libraries loaded.mv /etc/php.ini /etc/php.ini.v4
mv /etc/php.ini.rpmnew /etc/php.ini
PHP 5 upgrade on Centos 4.3
PHP 5 upgrade on Centos 4.3
Just thought I'd share. It works smoothly going from 4.3.9 provided you do