web development question

I have a programming background but never done Web Programming before.
I would like to get to Server-Side Web programming. I need your advice
for today best candidate to future web development, I mean tell me
which of the following do you suggest that I put spend my time and
energy on it so It has a good future and I can get a job or I can
develope great web pages and it does not obsolete soon:

VB
Java Script
PHP
Perl
Others ....


For example if I become master in PHP is it a good path or any others
is the best candidate? Personally I think PHP gives me a rapid path to
get to server-base programming but I want to make sure it does not
vanish anytime soon.

PLEASE ADVICE. THANKS!

.

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