And it will give you skills to learn anything else you want tio very rapidly. And I mean it.
Get Dev-PHP 2 (PHP code editor - you can use Notepad (i do) but this is easier to use for starters).
Get yourself some basic PHP scripts (maybe a PHP Form to email script) and open it in PHP-Dev.
Look at its source code. Try to understand how does it work: what does each line do.
How is it structured.
Try, try and try in your hosting account (a shared account will do) if you don't know how to setup a WAMP server (it's really easy though).
Need help on a specific function? Google "functionname php" and you'll get the official manual's help.
Need a specific function? Do the same.
You can also ask. But if you find each function by yourself you will never forget it.
Best of luck