Fatal error: Class 'PDO' not found problem

You need a testing server to parse PHP code locally.

Which testing server do you have  -- Xampp, Wamp, Mamp/Mamp Pro?

Did you define the testing server in Dreamweaver?

This error reports that the web server was unable to locate a PHP module called “PDO” in the server. Web applications require this PHP module to establish a database connection.

Have a look at the compiled mosules list using the phpinfo() function.

To do this, create a new file called phpinfo.php and as the only instruction, type `phpinfo()` (without the `) and run the file. This will give you similar to

If you do not see the above, then you will need to go to `php.ini` to enable the extensions.