According to the call for presenter’s website: http://cfp.zendcon.com/ Zend Con will be:
Oct 19-22 2015 (Monday – Thursday)
Hard Rock Hotel & Casino
Las Vegas, NV
Dedicated tracks for:
CMS: WordPress, Drupal, Joomla
Frameworks: Zend, Larabel, Symfony
E-Commerce: Magento
Platforms: Linux, IBM
Future: PHP 7