Data Accessing with Doctrine

Doctrine ORM is a popular ORM framework in PHP world, which is highly inspired by the existing Java ORM frameworks, esp. JPA specification and Hibernate.

There are two core components in Doctrine project:

• doctrine/dbal is a low-level abstraction layer for database operations, imagine it is the Jdbc role in Java world.
• doctrine/orm is the advanced ORM framework which public APIs are similar to JPA/Hibernate.

Nowadays Doctrine includes a lot of PHP libraries. In this tutorial we mainly use ORM components.