There is a range of mssql_*
Which are not in the depreciation process.
They work the same as mysql_*
functions; they need to me manually es
PDO is the obvious choice with security in mind. PDO code is portable - it can be adjusted to send information to a number of databases without having to change the function calls and only changing a few parameters.
The MSSQL class is not portable the way that PDO is portable.
PDO has excellent support for prepared statements while MSSQL has none. PDO acts as an abstraction layer much like JDBC in Java and is portable. PDO has support for transactions, is better for handling errors
Hope the answer is obvious!