PHP Programming Language - OpenLibra

Doctrine (PHP) 50
back-ends, without requiring any code duplication.
Writing queries explicitly however is not always necessary, as Doctrine performs joins and fetches related objects
automatically. Small projects can be easily constructed without writing queries.
Other notable features of Doctrine are:
• support for hierarchical (tree-structured) data;
• support for hooks (methods which can validate or modify database input and output) and event listeners to
structure business-related logic;
• column aggregation inheritance (similar objects can be stored in one database table, with one type-column
specifying the subtype of the particular object - the correct subclass is always returned when a query is done);
• a caching framework, making use of several backends such as memcached, SQLite or APC;
• ACID transactions;
• model behaviors (sluggable, timestampable, nested set, internationalization, audit log, search index);
• database migrations;
• a "compile" function to combine many PHP files of the framework into one, to avoid the performance hit usually
incurred by including the many PHP files of a framework.
History
Doctrine was started by Konsta Vesterinen, also known as zYne-. The project's initial commit was made on April 13,
2006 to the svn repository [2] . As the project became more mature, the adoption began to pick up. Before long, the
community was active and development was receiving regular contributions, among others from the Google Summer
of Code project.
Doctrine 1.0.0 was released on September 1, 2008. [3]
Influences
Doctrine has been influenced by dozens of projects and many different people. The largest influences have been the
Java ORM Hibernate and ActiveRecord from Ruby on Rails. Both of these ORM solutions have implemented a fully
featured solution in the Java and Ruby languages. The purpose of the Doctrine project is to build an equally powerful
solution for the PHP language.
Community
• There is an active IRC channel where users and developers of Doctrine hang out. The channel is on the freenode
network (irc.freenode.net); the channel name is #doctrine. irc:/ / irc. freenode. net/ #doctrine
• User mailing list: http:/ / groups. google. com/ group/ doctrine-user
• Development mailing list: http:/ / groups. google. com/ group/ doctrine-dev
• Commit log mailing list: http:/ / groups. google. com/ group/ doctrine-svn