Php will be still around because it can work on almost any host.
Yes all of this languages will be there in the future.
I wish that PHP would be less popular because it's a messy language,but i dont think so.
PHP: a fractal of bad design
I wrote a little about Python and web here.
Thank you for your answer I have chosen to go with kiwi and Flask and php jquery Angular.js.
To know more is power I think