<?php echo "Hello World";?>
The code above would be the best piece to start off. There is so much possibility with just 'Echo' to use. I suggest you move on next to learning variable handling, after that, learn 'If' statements. After that you should have the basic grasp of the language where you could pretty much 'talk' and 'reason' by speaking PHP. It's a language, remember, only that it's more technical, optimized, and you have a few selections of words to choose.