是否有用于使用MS SQL数据库执行大多数常用功能的PHP类？

Before I go starting to write the functions to connect to, retrieve the rows from my MS SQL database, I was wondering if there is already a publicly available class that wraps this functionality into a class object.

something like this? SQL PHP Class

Yes there is. You can just use PHP's PDO classes.There is a PDO driver available for MS SQL server.