The ZendCon conference has officially announced the opening of their Call for Papers for this year's event:
We’re pleased to announce the 10th annual ZendCon which will be held October 27-30th, 2014 in Santa Clara, CA. ZendCon 2014 has a long history of being one of the “must attend” PHP conferences as community members from around the world have come together to learn and share information about the latest trends and technologies in professional PHP development. [...] We would welcome submission of any talk included in the wide variety of topics related to PHP and tools commonly used by PHP developers.
The topics they're focusing on this year include PHP best practices, continuous delivery and application architecture. The event is happening October 27th through the 30th in Santa Clara, California. The deadline for the Call for Papers is June 16th, 2014 so submit those ideas early and often. You can find more information about the conference on their main site.