Sure, all the rest of these languages are fancy and some startups are actually using them (when boiled down just ends up between node.js, Scala(Java) and a NoSQL database du jour).
No company uses python outside of scientific use (where it can be very powerful). No company uses Ruby anymore besides the odd legacy app.
Facebook, Google, Twitter, OkCupid ... Average startup - PHP, JS, C-variants, HTML, CSS, Java-flavor. It's powerful, plenty of established applications and COTS will generally be a good enough solution for most people. It's foolish to write from the ground up these days in an odd language given the existence of open source solutions for just about anything. And with PHP getting faster and more efficient it scales very well.
I just implemented an open source CRM with a bunch of custom work on a 300MB VPS - Nginx, PHP 5.5 with OpCache, MariaDB, JS, CSS, HTML - can sustain 50MBps of traffic to the CRM without a single drop (3ms response); 2000 complex queries on the CMS per second under 100ms response, I can simply throw more hardware at it if I need more but for a 300-member club, that's plenty.