Welcome to the changelog for the Optimizely X Full Stack 2.x documentation!
## Full Stack SDK changelogs
This table lists the GitHub changelog URLs for the Full Stack SDKs.
## April 2019
April 19: Removed support for the cURL-based event dispatcher for PHP SDK v2.x due to a security vulnerability. For more information, see our [Security Bulletin ID: opt-2019-0001](🔗) and the 3.0.1 entry in the PHP changelog above.
## January 2019
Jan 30: Added React SDK link to [Demo apps and SDK wrappers](🔗)
Jan 04: Released the revised Full Stack 2.x developer documentation that includes updated content and a revised structure.
## November 2018
Nov 16: Published updated documentation for the Full Stack 3.0 Early Access release, which includes the enhanced Audience Match Types functionality. For more information, see [Full Stack v3.0: Early Access](🔗) [link deprecated]. To join the Early Access program, contact your Optimizely Customer Support representative.
## October 2018
Oct 31: Added a new topic [Use the Full Stack REST API](🔗).
## September 2018
Sept 21: Updated 101 code samples.
Sept 14: Updated information for the nine Full Stack SDK API in **API Reference**.
## August 2018
Aug 31: Updated 94 code samples.
Aug 16: Initial release of the 2.1 documentation.