To be honest, as a developer, and someone who hires developers, courses / qualifications arent the first thing I look for in potential candidates. Especially for junior dev roles which I presume you will be going for.
First things I look for is good basic knowledge in front end / back end code (your portfolio of work, be it paid work, personal projects, whatever) depending on what we are after. Then a passion to learn and self improve. Then if they have specific development qualifications, all good, if not then its not the be all and end all.
Personally I would go the PHP route, theres a lot more out there in terms of free learning, because the language is heavily supported by the open source community. Also setting up LAMP / WAMP on your home PC is really simple, and the majority of web hosts out there are primarily PHP.
That said, if you are looking for a job in house at some company supporting an existing system, asp.net could be the way to go. If you want a job at an agency building various systems and working on lots of different stuff, I would definitely look at PHP.