Should I learn PHP instead of Ruby?

Someone adviced me to learn the language that is used by the company you want to work for. For example, if you want to apply at a local company that use WordPress as their CMS, then PHP is the language you want to learn first. Again, this is just advice, do what you think is right for you.

Personally, I would advice to learn PHP first for many reasons. As Jeff Atwood (probably one of the greatest haters of PHP out there) said;

If you want to produce free-as-in-whatever code that runs on virtually every server in the world with zero friction or configuration hassles, PHP is damn near your only option.

Jeff Atwood, Coding Horror

PHP sucks less than it used to, and by that I mean that there used to be horrible tutorials with bad coding standards. The community is certainly undergoing a transition. It used to be hobbyists, script kiddies and beginners (I was one of them), now there are more professionals whose companies have (rightly or wrongly) invested in PHP based products and services; It has pushed the community in the right direction. There are a ton of devs out there who basically grew up on PHP / CGI / PERL and it stands to reason that as the people mature, so does the community. Even Facebook released an "upgraded" version of PHP called (HHVM).

Sites like PHP the Right Way enforce better coding standards, and Teamtreehouse, TutsPlus, Laracasts, and others like them, are making lots of high quality modern PHP tutorials with (mostly) good information. Personally, a newer Framework called Laravel has made PHP a joy to build applications in.

However, in the end, the more you know the better. So why not learn both? you never know what tools you'll need for the job ;)