SQLazo: MySQL database abstraction access layer

This package implements a MySQL database abstraction access layer.

There is a base class that implements common database access functionality.

There are also sub-classes that implement MySQL database access operations using the regular MySQL extension and another that uses the MySQLi extension.

Currently the derived classes can connect of a MySQL database server, use a given database, execute queries, get the number of result rows, and retrieve the query result rows. Trazability added.

The code and comments are in Spanish. In Spanish:

Clase para acceso a base de datos (por el momento sólo a MySQL). La iré ampliando a medida que vaya necesitando funcionalidades o acceso a otros motores. Añadida trazabilidad, mediante una clase intermedia.