The base content is copyright  © by the PHP Documentation Group.  Where modifications have been made, the copyright is held by the OpenApprentice Foundation. This material may be distributed only subject to the terms and conditions set forth in the Creative Commons Attribution 3.0 License or later.  A copy of the Creative Commons Attribution 3.0 license is distributed with this manual and training platform.  The latest version is presently available at

If you are interested in redistribution or republishing of this document in whole or in part, either modified or unmodified, and you have questions, please contact the copyright holders at regarding the base document content or regarding the updated content. Note that is mapped to a publicly archived mailing list.