Some awesome presentation links. Mandatory to watch.

Modern PHP

(PHP Tek 2014) by @Ben Ramsey

Vagrant for PHP Developers

by @Erika Heidi

Composer: Stability and Semantic Versioning Demystified

(php[tek] 2014) by @Beau Simensen

PHP 5.5

by Karel Čížek

Static Sites with Sculpin

(php[tek] 2014) @Beau Simensen

Threads in PHP - will change the world

by TechDivision GmbH

PHP at Density and Scale (Lone Star PHP 2014)

by David Strauss