PDO is the best way to access databases in PHP among other web programming languages. PDO is not database specific, so we can use it to connect and control data for a very broad selection of databases. PDO is most  secured and easy way to access any database.

PDO stands for PHP Data Objects and a little Object Oriented Programming understanding is necessary but not required to follow the course.

The awesome thing about PDO is that because it offers data-access abstraction you can use the same functions to create, read, update and delete with any database you choose. PDO doesn't replace SQL or rewrites it but it adds features that are not accessible any other way.