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

zendcon

Dedicated tracks for:

CMS: WordPress, Drupal, Joomla

Frameworks: Zend, Larabel, Symfony

E-Commerce: Magento

Platforms: Linux, IBM

Future: PHP 7