I am currently running PHP 5.2.9 but I am still using MySQL4. I am running a lot of Perl and PHP scripts (that use MySQL database) in my websites. I would like to upgrade to MySQL5 but I worry that my scripts will stop working. Will my scripts stop functioning?
After upgrading and if there are problems, can I switch back to MySQL4?
After upgrading and if there are problems, can I switch back to MySQL4?