What I always liked about PHP, is that you can hardly find any other programming language as easy to learn as that: you can literally start programming in 5 minutes, after you pick one of the dozens of free web hosts out there.
Register, open your editor of choice, type
<?php echo "Hello World"; ?>save and upload the file to your webhost via FTP or whatever browser uploader your provider is offering.
There, you can already access your page from your browser to see the result of your little program.
Pretty straight forward, right?
Next step would be reading something more about PHP in the excellent tutorial on the official site, and start making something more useful. I've actually seen people that never coded a single line in their lives, but could still make some small modifications to make a script do what they wanted.
Yes, PHP is this easy to learn, it's free, it's very well supported and it can be found everywhere.
But, if it sounds so good, why do I think it's "fading away"?