How to Configure a PHP PDO Connection using Class Variables to Setup Database Parameters By Manuel Lemos PDO is a popular PHP extension that provides several interfaces for classes that can access many types of SQL databases.

Usually, the developer defines a connection to a specific database type using a connection string with a particular syntax.

Many developers prefer to set connection parameters using specific values passing individual parameters because it is more clear to configure each parameter.

This class provides a means to connect to a database using PDO by specifying the connection parameter values using class variables of a sub-class of this class.