The Lone Star PHP Conference in Dallas, Texas has officially announced their 2013 event and the opening of their Call for Papers:

Welcome back to Lone Star PHP for another great year! We're in our third year and we're making things better all the time. This year's event will provide all of the great PHP speakers and content you've come to expect from Lone Star PHP. There'll be plenty of time to spend with the local PHP community too through after-parties and other events.

The event is happening on June 28th and 29th at the Addison Conference Center in Dallas. The Call for Papers ends on February 28th (end of this month) so be sure to get those proposals in soon!