Symphony CMS is an open source content management system written in PHP. It was first released in 2006. Symphony has a strong focus on flexibility, extensibility, and keeping the core codebase small.
Some key features of Symphony CMS include:
Symphony can be a good choice for developers looking for a flexible and extensible PHP CMS. The modular architecture and use of XSLT allows extreme levels of customization. However, it may have a steeper learning curve than other PHP CMS options.