What is Doctrine?
Doctrine is an object relational mapper (ORM) for PHP 5.2.3+ that sits on top of a powerful database abstraction layer (DBAL). One of its key features is the option to write database queries in a proprietary object oriented SQL dialect called Doctrine Query Language (DQL), inspired by Hibernates HQL. This provides developers with a powerful alternative to SQL that maintains flexibility without requiring unnecessary code duplication.
What is an ORM?
Object relational mapping is a technique used in programming languages when dealing with databases for translating incompatible data types in relational databases. This essentially allows for us to have a “virtual object database,” that can be used from the programming language. Lots of free and commercial packages exist that allow this but sometimes developers chose to create their own ORM.
You can browse below url find more details :
http://www.doctrine-project.org/projects/orm/1.2/docs/manual/introduction/en#what-is-doctrine?
